Evidence · Field data

Field measurement database

Every individual before-and-after measurement in our records — 386 vehicles, 21 manufacturers, four countries — published in full, including the 10 rows recorded without a manufacturer we could identify, including the 300 measurements we cannot verify. These are field readings, not controlled trials: read the documentation status before you read the numbers.

386Individual vehicle measurements
+23.7%Median change across all measurements
86From named operators — the verifiable subset
1Measurements in which consumption got worse
Where this data comes from

Three campaigns, two very different levels of documentation

This matters more than any figure on the page. Three quarters of these measurements come from a single campaign with no operator names, no test type and no method recorded — all dated the same day.

Documentation status per campaign, as recorded in the source workbook.
CampaignMeasurementsOperator namedTest type recordedMedianStatus
Japan, 2014–201984Yes — 46 operatorsPartly (52 of 386 overall)+12.7%Verifiable
Vietnam (Ho Chi Minh), 20192Yes — ALSOK VietnamYes — before/after+11.5%Verifiable
Philippines (Manila)6NoNo+35.5%Undocumented
India (Mumbai), 01.06.2013294NoNo+24.8%Undocumented — 76% of the dataset
Distribution of the 386 individual measurements Histogram of fuel-efficiency change across 386 measurements. The largest group, 113 measurements, falls between 20 and 25 per cent. Only one measurement is negative and nine are below 5 per cent. 46 are above 40 per cent. Number of measurements named operatorundocumented campaign 1 -10–0% 8 0–5% 26 5–10% 23 10–15% 42 15–20% 113 20–25% 93 25–30% 34 30–40% 46 40–80% Change in fuel efficiency (km/L)
Vertical axis starts at zero. Green is the share of each bar that comes from a named Japanese operator; grey is the undocumented 2013 Mumbai campaign. Note that the grey dominates everything above 20% — which is the single most important thing to understand about this dataset.
All 386 measurements

Browse the full dataset

Nothing is filtered out and nothing is rounded in our favour. Use the controls to separate the documented measurements from the undocumented campaign.

Showing all 386 measurements

Individual measurements. “Change” is fuel efficiency in km/L; a positive figure means the vehicle travelled further on the same fuel. CO₂ is the calculated change in grams per kilometre.
VehicleOperatorCountryFuelBefore (km/L)After (km/L)ChangeCO₂ (g/km)
Nissan CaravanALSOK(警送神奈川)JapanGasoline 6.357.63+20.2% -61.3
Nissan CaravanALSOK(警送神奈川)JapanGasoline 6.837.65+12.0% -36.4
Nissan CaravanALSOK(警送神奈川)JapanGasoline 7.017.31+4.3% -13.6
Nissan CaravanALSOK(警送神奈川)JapanGasoline 7.057.49+6.2% -19.3
Nissan CaravanALSOK(警送神奈川)JapanGasoline 6.767.13+5.5% -17.8
Nissan CaravanALSOK(警送神奈川)JapanGasoline 6.787.38+8.8% -27.8
Nissan CaravanALSOK(警送神奈川)JapanGasoline 6.077.04+16.0% -52.7
Nissan CaravanALSOK(警送神奈川)JapanGasoline 6.587.29+10.8% -34.3
Nissan CaravanALSOK(警送神奈川)JapanGasoline 6.536.98+6.9% -22.9
Nissan CaravanALSOK(警送神奈川)JapanGasoline 6.727.58+12.8% -39.2
Nissan CaravanALSOK(警送神奈川)JapanGasoline 7.347.70+4.9% -14.8
Isuzu ElfALSOK(警送神奈川)JapanDiesel 5.277.92+50.3% -166.3
Isuzu ComoALSOK(警送神奈川)JapanGasoline 4.946.43+30.2% -108.8
SucceedALSOK(川崎支社)JapanGasoline 6.958.45+21.6% -59.3
Zendai Japan TaxiN交通(タクシー)JapanLPG 11.8912.89+8.4% -19.6
Zendai Japan TaxiN交通(タクシー)JapanLPG 11.8912.59+5.9% -14.0
Zendai Japan TaxiN交通(タクシー)JapanLPG 11.8913.09+10.1% -23.1
Zendai Japan TaxiN交通(タクシー)JapanLPG 11.8911.11-6.6% 17.7
Toyota Crown Comfort岩井田タクシーJapanLPG 5.616.07+8.2% -40.5
Toyota Crown Comfort岩井田タクシーJapanLPG 6.237.05+13.2% -56.0
Toyota Priusα岩井田タクシーJapanLPG 13.3016.06+20.8% -38.8
Crown ComfortアサヒタクシーJapanLPG 6.136.21+1.3% -6.3
JAP TaxiアサヒタクシーJapanLPG 13.7614.58+6.0% -12.3
SP Deluxe三和交通JapanLPG 5.675.81+2.5% -12.7
SP Deluxe三和交通JapanLPG 5.225.67+8.6% -45.6
Limousine Bus神田交通JapanDiesel 89.30104.69+17.2% -4.3
Crown Comfort三和交通JapanLPG 3.545.96+68.4% -344.1
Crown Comfort三和交通JapanLPG 3.215.64+75.7% -402.7
Isuzu Eif 2tアルフレッサJapanDiesel 6.577.12+8.4% -30.8
Mitsubishi 5tアルフレッサJapanDiesel 5.306.36+20.0% -82.4
Toyota Priusα/2012愛知県TさんJapanGasoline 21.9024.90+13.7% -12.8
Toyota Priusα/2009東京都KYさんJapanGasoline 25.0027.10+8.4% -7.2
Nissan NOTE/2009東京都FNさんJapanGasoline 20.0020.80+4.0% -4.5
VOLVOV70鳥取県EYさんJapanGasoline 6.508.00+23.1% -66.9
Toyota Alphard/2004神奈川県TTさんJapanGasoline 8.3010.10+21.7% -49.8
Nissan X-Trail/2008富山県IMさんJapanGasoline 8.7010.00+14.9% -34.7
Toyota Wish新潟県YSさんJapanGasoline 9.6010.40+8.3% -18.6
Toyota Wish/2003福岡県SMさんJapanGasoline 16.7020.20+21.0% -24.1
Toyoa Vitz /2000神奈川県TAMさんJapanGasoline 15.4019.40+26.0% -31.1
Suzuki Every/1996岡山県SKさんJapanGasoline 8.4010.90+29.8% -63.3
Honda Odyssey/1998群馬県HYさんJapanGasoline 6.509.60+47.7% -115.3
Toyota Camry /2007広島県ATさんJapanGasoline 8.009.50+18.8% -45.8
Nissan Cube /2000東京都YTさんJapanGasoline 8.5010.50+23.5% -52.0
Daihatsu Cube/2010山梨県TKさんJapanGasoline 20.0021.00+5.0% -5.5
Suzuki Wagon /2010東京都DHさんJapanGasoline 16.8020.50+22.0% -24.9
Daihatsu Mira/2012埼玉県YTさんJapanGasoline 21.5024.20+12.6% -12.0
Mitsubishi Dion福島県SSさんJapanGasoline 13.5016.10+19.3% -27.8
Benz 240/1998静岡県ISさんJapanGasoline 9.6010.70+11.5% -24.8
Benz 320/1999北海道SIさんJapanGasoline 11.1012.60+13.5% -24.9
Mitsubishi Mini Cab 2007東京都SHさんJapanGasoline 10.5012.00+14.3% -27.6
Nissan Rasheen /1999東京都SOさんJapanGasoline 8.5010.50+23.5% -52.0
SubaruLegacy2.0i/2003埼玉県MKさんJapanGasoline 8.5011.80+38.8% -76.3
WV Golf /2004石川県YSさんJapanGasoline 10.2012.05+18.1% -34.9
Nissan Cubeブリジストン Cockpit 1号店JapanGasoline 10.9012.40+13.8% -25.7
Matsuda Demioブリジストン Cockpit 1号店JapanGasoline 7.008.50+21.4% -58.5
Suzuki Jimny JB23W/2008ブリジストン Cockpit 1号店JapanGasoline 7.008.00+14.3% -41.4
Toyota Estima 2400cc/2001ブリジストン Cockpit 1号店JapanGasoline 5.045.23+3.8% -16.7
VW Poloブリジストン Cockpit 1号店JapanGasoline 8.009.13+14.1% -35.9
Isuzu Elf 2tAJapanDiesel 7.078.12+14.9% -47.9
Hino Ranger 3tBJapanDiesel 7.027.82+11.4% -38.2
Isuzu Foward 4tCJapanDiesel 5.385.97+11.0% -48.1
Hino Truck 4t大和物流三郷支店JapanDiesel 7.107.75+9.2% -30.9
Isuzu Fowerd大和物流三郷支店JapanDiesel 7.038.27+17.6% -55.9
Isuzu Fowerd大和物流三郷支店JapanDiesel 6.857.13+4.2% -15.3
Hino Truck 4t大和物流三郷支店JapanDiesel 7.107.76+9.3% -31.5
Hino Truck 5t大和物流三郷支店JapanDiesel 6.807.50+10.3% -36.0
Hino Truck 6t大和物流三郷支店JapanDiesel 6.817.26+6.6% -23.8
Toyota HiAce/3000CC/2013株式会社玉子屋JapanGasoline 9.1110.33+13.4% -30.1
Toyota HiAce/3000CC/2102株式会社玉子屋JapanGasoline 4.405.24+19.1% -84.5
Toyota HiAce/3000CC/2012株式会社玉子屋JapanGasoline 5.506.63+20.5% -71.9
Isuzu Elf 100コカ・コーライーストJapanGasoline 6.867.24+5.5% -17.8
Isuzu Elf 100コカ・コーライーストJapanGasoline 6.847.47+9.2% -28.6
Hino Dump 10t/2005有限会社いなべ物流サービスJapanDiesel 2.152.29+6.5% -74.5
Hino Dump 10t/2002有限会社いなべ物流サービスJapanDiesel 1.972.09+6.1% -76.4
Hino Truck 5/2014有限会社いなべ物流サービスJapanDiesel 6.396.70+4.9% -19.0
Hino Truck 10/2012有限会社いなべ物流サービスJapanDiesel 3.794.06+7.1% -46.0
Toyota Corolla HV株式会社CタクシーJapanGasoline 11.5516.02+38.7% -56.1
Toyota Prius株式会社CタクシーJapanGasoline 12.2215.68+28.3% -41.8
Hino Liesse2/2015Kタクシー株式会社JapanDiesel 5.676.17+8.9% -37.9
Isuzu ElfSサービスJapanDiesel 7.177.78+8.4% -28.4
Hino Profia LorryTunkT運輸JapanDiesel 3.964.26+7.7% -47.3
Hino TruckT輸送JapanDiesel 2.482.81+13.1% -122.4
Unitech某ガス会社(エアーウォーター)JapanDiesel 7.007.95+13.6% -44.7
Flatbed Truck某ガス会社(エアーウォーター)JapanDiesel 6.657.05+6.0% -22.4
Toyota Innova 1988ccALSOK VietnumVietnam (Ho Chi Minh)Gasoline 11.0511.80+6.8% -13.3
Toyota Innova 1988ccALSOK VietnumVietnam (Ho Chi Minh)Gasoline 6.807.90+16.2% -47.5
Tata Indica V2not recordedIndia (Mumbai)Gasoline 14.0016.80+20.0% -27.6
Tata Indica V2not recordedIndia (Mumbai)Gasoline 13.0015.90+22.3% -32.5
Tata Indica V2not recordedIndia (Mumbai)Gasoline 15.0018.20+21.3% -27.2
Tata Indica V2not recordedIndia (Mumbai)Gasoline 13.5015.90+17.8% -25.9
Tata Indica V2not recordedIndia (Mumbai)Gasoline 14.5017.50+20.7% -27.4
Tata Indica V2not recordedIndia (Mumbai)Gasoline 14.0016.80+20.0% -27.6
Tata Indica V2not recordedIndia (Mumbai)Gasoline 14.0016.80+20.0% -27.6
Renault Logannot recordedIndia (Mumbai)Gasoline 13.0015.90+22.3% -32.5
Renault Logannot recordedIndia (Mumbai)Gasoline 14.0017.40+24.3% -32.4
Renault Logannot recordedIndia (Mumbai)Gasoline 12.5015.30+22.4% -34.0
Renault Logannot recordedIndia (Mumbai)Gasoline 13.5016.50+22.2% -31.2
Renault Logannot recordedIndia (Mumbai)Gasoline 13.0016.00+23.1% -33.5
Renault Logannot recordedIndia (Mumbai)Gasoline 12.0014.30+19.2% -31.1
Renault Logannot recordedIndia (Mumbai)Gasoline 13.0016.00+23.1% -33.5
Toyota Innovanot recordedIndia (Mumbai)Gasoline 10.0012.00+20.0% -38.7
Toyota Innovanot recordedIndia (Mumbai)Gasoline 12.0014.60+21.7% -34.4
Toyota Innovanot recordedIndia (Mumbai)Gasoline 13.0021.10+62.3% -68.5
Toyota Innovanot recordedIndia (Mumbai)Gasoline 12.0014.00+16.7% -27.6
Toyota Innovanot recordedIndia (Mumbai)Gasoline 10.0012.00+20.0% -38.7
Toyota Innovanot recordedIndia (Mumbai)Gasoline 10.5012.60+20.0% -36.8
Toyota Innovanot recordedIndia (Mumbai)Gasoline 11.0013.30+20.9% -36.5
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 18.0022.10+22.8% -23.9
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 18.0022.50+25.0% -25.8
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 19.0023.60+24.2% -23.8
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 18.0021.60+20.0% -21.5
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 16.5020.30+23.0% -26.3
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 18.5022.80+23.2% -23.7
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 17.0021.10+24.1% -26.5
Tata Indigonot recordedIndia (Mumbai)Gasoline 14.0016.50+17.9% -25.1
Tata Indigonot recordedIndia (Mumbai)Gasoline 12.0014.30+19.2% -31.1
Tata Indigonot recordedIndia (Mumbai)Gasoline 14.5017.30+19.3% -25.9
Tata Indigonot recordedIndia (Mumbai)Gasoline 14.0016.10+15.0% -21.6
Tata Indigonot recordedIndia (Mumbai)Gasoline 13.0015.30+17.7% -26.8
Tata Indigonot recordedIndia (Mumbai)Gasoline 14.0016.80+20.0% -27.6
Tata Indigonot recordedIndia (Mumbai)Gasoline 15.0017.70+18.0% -23.6
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 9.0011.50+27.8% -56.0
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 10.0013.00+30.0% -53.5
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 9.0011.60+28.9% -57.8
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 9.0011.30+25.6% -52.5
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 8.0010.20+27.5% -62.5
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 8.5010.90+28.2% -60.1
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 11.0014.20+29.1% -47.5
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 16.0020.20+26.2% -30.1
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 15.5019.80+27.7% -32.5
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 17.0021.30+25.3% -27.6
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 16.0019.70+23.1% -27.2
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 14.0017.60+25.7% -33.9
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 16.0020.20+26.2% -30.1
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 15.0019.10+27.3% -33.2
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 11.0013.60+23.6% -40.3
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 9.0011.30+25.6% -52.5
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 9.5011.50+21.1% -42.5
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 11.0013.80+25.5% -42.8
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 10.0012.50+25.0% -46.4
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 10.5013.00+23.8% -42.5
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 11.0013.60+23.6% -40.3
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 9.5012.30+29.5% -55.6
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 9.0011.80+31.1% -61.2
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 10.0013.00+30.0% -53.5
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 9.5012.30+29.5% -55.6
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 9.5012.00+26.3% -50.9
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 8.5011.10+30.6% -63.9
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 9.0011.60+28.9% -57.8
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 8.009.70+21.2% -50.8
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 8.5010.50+23.5% -52.0
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 8.009.40+17.5% -43.2
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 7.509.20+22.7% -57.2
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 9.0011.00+22.2% -46.9
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 8.009.70+21.2% -50.8
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 9.0010.90+21.1% -44.9
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 14.0016.40+17.1% -24.3
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 13.5015.90+17.8% -25.9
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 13.0014.80+13.8% -21.7
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 15.0017.60+17.3% -22.8
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 14.0016.50+17.9% -25.1
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 14.0016.70+19.3% -26.8
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 15.5018.10+16.8% -21.5
Hyundai i10not recordedIndia (Mumbai)Gasoline 13.0015.00+15.4% -23.8
Hyundai i10not recordedIndia (Mumbai)Gasoline 13.5015.80+17.0% -25.0
Hyundai i10not recordedIndia (Mumbai)Gasoline 13.0015.00+15.4% -23.8
Hyundai i10not recordedIndia (Mumbai)Gasoline 13.0015.00+15.4% -23.8
Hyundai i10not recordedIndia (Mumbai)Gasoline 12.5014.50+16.0% -25.6
Hyundai i10not recordedIndia (Mumbai)Gasoline 14.0016.20+15.7% -22.5
Hyundai i10not recordedIndia (Mumbai)Gasoline 13.0014.60+12.3% -19.6
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 11.0013.40+21.8% -37.8
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 11.0013.60+23.6% -40.3
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 10.5012.80+21.9% -39.7
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 11.5013.70+19.1% -32.4
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 10.5012.90+22.9% -41.1
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 12.0014.60+21.7% -34.4
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 11.0013.50+22.7% -39.1
Honda Accordnot recordedIndia (Mumbai)Gasoline 7.509.80+30.7% -72.6
Honda Accordnot recordedIndia (Mumbai)Gasoline 8.0010.60+32.5% -71.1
Honda Accordnot recordedIndia (Mumbai)Gasoline 8.0010.50+31.2% -69.0
Honda Accordnot recordedIndia (Mumbai)Gasoline 8.0010.20+27.5% -62.5
Honda Accordnot recordedIndia (Mumbai)Gasoline 7.009.10+30.0% -76.5
Honda Accordnot recordedIndia (Mumbai)Gasoline 7.009.20+31.4% -79.3
Honda Accordnot recordedIndia (Mumbai)Gasoline 7.509.80+30.7% -72.6
Tata Sumonot recordedIndia (Mumbai)Diesel 10.5013.00+23.8% -48.0
Tata Sumonot recordedIndia (Mumbai)Diesel 10.5013.20+25.7% -51.0
Tata Sumonot recordedIndia (Mumbai)Diesel 10.0012.50+25.0% -52.4
Tata Sumonot recordedIndia (Mumbai)Diesel 10.5013.00+23.8% -48.0
Tata Sumonot recordedIndia (Mumbai)Diesel 11.0013.80+25.5% -48.3
Tata Sumonot recordedIndia (Mumbai)Diesel 11.0013.30+20.9% -41.2
Tata Sumonot recordedIndia (Mumbai)Diesel 10.5013.00+23.8% -48.0
Maruti eeconot recordedIndia (Mumbai)Gasoline 14.5018.10+24.8% -31.8
Maruti eeconot recordedIndia (Mumbai)Gasoline 15.5019.40+25.2% -30.1
Maruti eeconot recordedIndia (Mumbai)Gasoline 15.0018.80+25.3% -31.3
Maruti eeconot recordedIndia (Mumbai)Gasoline 15.0018.30+22.0% -27.9
Maruti eeconot recordedIndia (Mumbai)Gasoline 14.5018.30+26.2% -33.2
Maruti eeconot recordedIndia (Mumbai)Gasoline 14.0017.80+27.1% -35.4
Maruti eeconot recordedIndia (Mumbai)Gasoline 14.5018.30+26.2% -33.2
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 6.509.10+40.0% -102.0
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 6.508.90+36.9% -96.2
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 6.008.50+41.7% -113.7
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 6.509.10+40.0% -102.0
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 7.009.90+41.4% -97.1
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 5.007.10+42.0% -137.2
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 6.008.40+40.0% -110.5
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 10.0014.20+42.0% -68.6
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 9.0013.00+44.4% -79.3
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 10.0014.20+42.0% -68.6
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 10.0014.20+42.0% -68.6
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 10.0014.30+43.0% -69.8
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 11.0015.30+39.1% -59.3
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 9.5013.60+43.2% -73.6
Audi A6not recordedIndia (Mumbai)Gasoline 6.509.80+50.8% -120.2
Audi A6not recordedIndia (Mumbai)Gasoline 6.008.80+46.7% -123.0
Audi A6not recordedIndia (Mumbai)Gasoline 7.5011.30+50.7% -104.0
Audi A6not recordedIndia (Mumbai)Gasoline 7.0010.30+47.1% -106.2
Audi A6not recordedIndia (Mumbai)Gasoline 6.009.10+51.7% -131.7
Audi A6not recordedIndia (Mumbai)Gasoline 6.509.80+50.8% -120.2
Audi A6not recordedIndia (Mumbai)Gasoline 6.509.80+50.8% -120.2
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 10.0012.40+24.0% -44.9
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 10.0012.60+26.0% -47.9
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 9.0011.20+24.4% -50.6
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 9.5011.80+24.2% -47.6
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 11.0013.80+25.5% -42.8
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 8.0010.00+25.0% -58.0
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 10.0012.10+21.0% -40.3
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 16.0019.50+21.9% -26.0
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 12.0014.90+24.2% -37.6
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 17.0020.90+22.9% -25.5
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 16.0019.50+21.9% -26.0
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 15.0018.30+22.0% -27.9
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 15.0017.90+19.3% -25.1
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 11.0013.50+22.7% -39.1
Toyota Fortuner Gasnot recordedPhilippines (Manila)Gasoline 8.0010.40+30.0% -66.9
Hyundai Elantra Gasnot recordedPhilippines (Manila)Gasoline 20.0027.00+35.0% -30.1
Mitsubishi Strada GLX-V Dieselnot recordedPhilippines (Manila)Diesel 16.0022.80+42.5% -48.8
Hyundai Starex Dieselnot recordedPhilippines (Manila)Diesel 10.0013.60+36.0% -69.4
Mitsibishi L300 FB Dieselnot recordedPhilippines (Manila)Diesel 15.0019.60+30.7% -41.0
Isuzu D-Max Dieselnot recordedPhilippines (Manila)Diesel 14.0019.60+40.0% -53.5
Tata Indica V2not recordedIndia (Mumbai)Gasoline 17.5021.20+21.1% -23.1
Tata Indica V2not recordedIndia (Mumbai)Gasoline 19.0023.00+21.1% -21.2
Tata Indica V2not recordedIndia (Mumbai)Gasoline 17.5020.70+18.3% -20.5
Tata Indica V2not recordedIndia (Mumbai)Gasoline 17.0020.70+21.8% -24.4
Tata Indica V2not recordedIndia (Mumbai)Gasoline 17.5021.40+22.3% -24.2
Tata Indica V2not recordedIndia (Mumbai)Gasoline 18.0022.10+22.8% -23.9
Tata Indica V2not recordedIndia (Mumbai)Gasoline 18.5022.40+21.1% -21.8
Renault Logannot recordedIndia (Mumbai)Gasoline 19.0023.40+23.2% -23.0
Renault Logannot recordedIndia (Mumbai)Gasoline 19.0023.60+24.2% -23.8
Renault Logannot recordedIndia (Mumbai)Gasoline 20.0024.60+23.0% -21.7
Renault Logannot recordedIndia (Mumbai)Gasoline 19.0022.80+20.0% -20.4
Renault Logannot recordedIndia (Mumbai)Gasoline 18.0022.50+25.0% -25.8
Renault Logannot recordedIndia (Mumbai)Gasoline 18.0022.30+23.9% -24.9
Renault Logannot recordedIndia (Mumbai)Gasoline 18.5022.80+23.2% -23.7
Toyota Innovanot recordedIndia (Mumbai)Gasoline 12.5015.30+22.4% -34.0
Toyota Innovanot recordedIndia (Mumbai)Gasoline 12.0014.90+24.2% -37.6
Toyota Innovanot recordedIndia (Mumbai)Gasoline 12.0014.60+21.7% -34.4
Toyota Innovanot recordedIndia (Mumbai)Gasoline 13.0016.00+23.1% -33.5
Toyota Innovanot recordedIndia (Mumbai)Gasoline 12.5015.30+22.4% -34.0
Toyota Innovanot recordedIndia (Mumbai)Gasoline 13.0015.50+19.2% -28.8
Toyota Innovanot recordedIndia (Mumbai)Gasoline 12.5015.40+23.2% -35.0
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 20.0025.00+25.0% -23.2
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 21.0026.70+27.1% -23.6
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 20.0025.00+25.0% -23.2
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 23.0029.00+26.1% -20.9
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 19.0023.20+22.1% -22.1
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 22.0027.50+25.0% -21.1
Toyota Etiosnot recordedIndia (Mumbai)Gasoline 20.0025.20+26.0% -23.9
Tata Indigonot recordedIndia (Mumbai)Gasoline 17.0020.40+20.0% -22.7
Tata Indigonot recordedIndia (Mumbai)Gasoline 18.0022.00+22.2% -23.4
Tata Indigonot recordedIndia (Mumbai)Gasoline 17.0020.60+21.2% -23.8
Tata Indigonot recordedIndia (Mumbai)Gasoline 17.5021.00+20.0% -22.1
Tata Indigonot recordedIndia (Mumbai)Gasoline 21.0025.40+21.0% -19.1
Tata Indigonot recordedIndia (Mumbai)Gasoline 16.0018.70+16.9% -20.9
Tata Indigonot recordedIndia (Mumbai)Gasoline 18.0021.60+20.0% -21.5
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 13.0016.80+29.2% -40.4
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 13.0016.40+26.2% -37.0
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 14.5018.90+30.3% -37.2
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 14.0018.30+30.7% -38.9
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 12.0015.60+30.0% -44.6
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 13.0016.80+29.2% -40.4
Maruti Esteemnot recordedIndia (Mumbai)Gasoline 13.0016.80+29.2% -40.4
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 18.5023.50+27.0% -26.7
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 18.5023.50+27.0% -26.7
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 18.5023.50+27.0% -26.7
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 20.0024.50+22.5% -21.3
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 18.0023.00+27.8% -28.0
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 18.0023.20+28.9% -28.9
MarutiSwift Dzirenot recordedIndia (Mumbai)Gasoline 19.0024.30+27.9% -26.6
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 14.0017.50+25.0% -33.1
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 14.0017.80+27.1% -35.4
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 14.5018.30+26.2% -33.2
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 15.0018.30+22.0% -27.9
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 13.5017.00+25.9% -35.4
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 14.0017.50+25.0% -33.1
Mahindra xuv500not recordedIndia (Mumbai)Gasoline 16.0020.00+25.0% -29.0
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 13.0016.50+26.9% -37.9
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 13.0017.20+32.3% -43.6
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 15.0019.70+31.3% -36.9
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 15.0019.10+27.3% -33.2
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 14.0018.30+30.7% -38.9
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 13.0016.90+30.0% -41.2
Mahindra Xylonot recordedIndia (Mumbai)Gasoline 13.5017.60+30.4% -40.0
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 12.0015.00+25.0% -38.7
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 13.0016.50+26.9% -37.9
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 12.0015.10+25.8% -39.7
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 12.0015.00+25.0% -38.7
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 13.5017.00+25.9% -35.4
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 12.5015.30+22.4% -34.0
Mahindra Scorpionot recordedIndia (Mumbai)Gasoline 12.5015.60+24.8% -36.9
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 16.5019.80+20.0% -23.4
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 15.0018.20+21.3% -27.2
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 16.0019.20+20.0% -24.2
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 17.0019.90+17.1% -19.9
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 16.5020.10+21.8% -25.2
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 18.0021.80+21.1% -22.5
Chervolet Sparknot recordedIndia (Mumbai)Gasoline 16.0019.20+20.0% -24.2
Hyundai i10not recordedIndia (Mumbai)Gasoline 15.5018.30+18.1% -22.9
Hyundai i10not recordedIndia (Mumbai)Gasoline 14.0016.80+20.0% -27.6
Hyundai i10not recordedIndia (Mumbai)Gasoline 15.0017.90+19.3% -25.1
Hyundai i10not recordedIndia (Mumbai)Gasoline 15.5018.30+18.1% -22.9
Hyundai i10not recordedIndia (Mumbai)Gasoline 16.0019.00+18.8% -22.9
Hyundai i10not recordedIndia (Mumbai)Gasoline 16.0018.40+15.0% -18.9
Hyundai i10not recordedIndia (Mumbai)Gasoline 15.0017.70+18.0% -23.6
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 13.0016.30+25.4% -36.1
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 14.0017.50+25.0% -33.1
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 15.0018.80+25.3% -31.3
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 13.5016.50+22.2% -31.2
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 14.0017.60+25.7% -33.9
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 13.5017.10+26.7% -36.2
Hyundai Accentnot recordedIndia (Mumbai)Gasoline 13.0016.40+26.2% -37.0
Honda Accordnot recordedIndia (Mumbai)Gasoline 11.0014.30+30.0% -48.7
Honda Accordnot recordedIndia (Mumbai)Gasoline 12.0015.80+31.7% -46.5
Honda Accordnot recordedIndia (Mumbai)Gasoline 11.5015.10+31.3% -48.1
Honda Accordnot recordedIndia (Mumbai)Gasoline 11.5014.60+27.0% -42.8
Honda Accordnot recordedIndia (Mumbai)Gasoline 11.0014.40+30.9% -49.8
Honda Accordnot recordedIndia (Mumbai)Gasoline 10.5013.70+30.5% -51.6
Honda Accordnot recordedIndia (Mumbai)Gasoline 11.0014.30+30.0% -48.7
Tata Sumonot recordedIndia (Mumbai)Diesel 13.5017.00+25.9% -35.4
Tata Sumonot recordedIndia (Mumbai)Diesel 12.0015.10+25.8% -39.7
Tata Sumonot recordedIndia (Mumbai)Diesel 12.5015.80+26.4% -43.8
Tata Sumonot recordedIndia (Mumbai)Diesel 14.0017.90+27.9% -40.8
Tata Sumonot recordedIndia (Mumbai)Diesel 13.5017.10+26.7% -40.9
Tata Sumonot recordedIndia (Mumbai)Diesel 15.0018.50+23.3% -33.0
Tata Sumonot recordedIndia (Mumbai)Diesel 13.0016.50+26.9% -42.8
Maruti eeconot recordedIndia (Mumbai)Gasoline 18.5023.50+27.0% -30.1
Maruti eeconot recordedIndia (Mumbai)Gasoline 19.0023.60+24.2% -26.9
Maruti eeconot recordedIndia (Mumbai)Gasoline 18.5023.90+29.2% -28.3
Maruti eeconot recordedIndia (Mumbai)Gasoline 18.0023.00+27.8% -28.0
Maruti eeconot recordedIndia (Mumbai)Gasoline 19.0024.30+27.9% -26.6
Maruti eeconot recordedIndia (Mumbai)Gasoline 18.5023.50+27.0% -26.7
Maruti eeconot recordedIndia (Mumbai)Gasoline 18.0022.90+27.2% -27.6
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 10.0014.20+42.0% -68.6
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 9.0013.00+44.4% -79.3
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 10.0014.30+43.0% -69.8
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 11.0015.60+41.8% -62.2
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 10.0014.30+43.0% -69.8
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 11.5016.00+39.1% -56.7
Mercedes Benz E250not recordedIndia (Mumbai)Gasoline 10.0014.20+42.0% -68.6
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 12.5018.00+44.0% -56.7
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 12.0016.90+40.8% -56.1
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 12.5018.10+44.8% -57.4
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 14.0020.40+45.7% -52.0
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 13.0018.90+45.4% -55.7
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 12.5018.00+44.0% -56.7
BMW 3 Seriesnot recordedIndia (Mumbai)Gasoline 12.0017.30+44.2% -59.2
Audi A6not recordedIndia (Mumbai)Gasoline 9.5014.40+51.6% -83.1
Audi A6not recordedIndia (Mumbai)Gasoline 9.5014.20+49.5% -80.8
Audi A6not recordedIndia (Mumbai)Gasoline 10.0015.30+53.0% -80.4
Audi A6not recordedIndia (Mumbai)Gasoline 9.5014.60+53.7% -85.3
Audi A6not recordedIndia (Mumbai)Gasoline 9.0013.80+53.3% -89.7
Audi A6not recordedIndia (Mumbai)Gasoline 10.0015.20+52.0% -79.4
Audi A6not recordedIndia (Mumbai)Gasoline 11.0016.70+51.8% -72.0
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 11.5014.40+25.2% -40.6
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 11.5014.40+25.2% -40.6
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 12.0015.00+25.0% -38.7
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 11.0013.40+21.8% -37.8
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 11.5014.60+27.0% -42.8
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 11.5014.50+26.1% -41.7
Toyota Fortunernot recordedIndia (Mumbai)Gasoline 12.0015.40+28.3% -42.7
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 19.0023.60+24.2% -23.8
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 19.0023.80+25.3% -24.6
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 19.0023.80+25.3% -24.6
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 18.5022.40+21.1% -21.8
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 18.0022.70+26.1% -26.7
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 18.5022.90+23.8% -24.1
Maruti Wagon Rnot recordedIndia (Mumbai)Gasoline 21.0026.00+23.8% -21.2
How to read it

What this dataset is not

Four things you should hold against these numbers

  • Only one measurement in 386 got worse. Nine are below +5%. A field sample in which almost nothing ever deteriorates has been filtered somewhere along the way — we do not know where, and we publish it as it reached us rather than presenting it as a complete record.
  • 294 measurements carry no operator name, no test type and no method, and all share a single date in June 2013. They are marked as undocumented throughout this page and can be filtered out in one click. We show them because they exist, not because they prove anything.
  • The median here is far above our documented trials. This dataset sits at +23.7%; the fleet trials we can document methodically land between a small, inconclusive result and +28%, with the best-controlled one at +7.2%. Where the two disagree, believe the documented trials.
  • These are single readings, not trials. No baseline period, no control group, no repeat measurement — one before value and one after value per vehicle.

The verifiable part of this dataset is the 86 measurements from named operators. Those are the ones we would put in front of a technical buyer, and several of them are broken out as full fleet trials with method and limits: see the documented trials.

Field data — FAQ

Common questions

Why publish measurements you say you cannot verify?
Because they are part of our records, and a supplier who quietly removes the inconvenient three quarters of a dataset is doing something worse than publishing it with a warning. Everything undocumented is marked as such and can be filtered out in one click, so you can look at the verifiable 86 on their own.
Why is the median here so much higher than your fleet trials?
Mostly because of what the dataset is made of. Three quarters of it is one undocumented campaign whose median is +24.8%, while the documented Japanese measurements sit at +12.7% and our methodically documented fleet trials range from a small, inconclusive result to +28%. Single readings without a baseline period also tend to produce larger numbers than trials that measure over months.
Can I use these figures to estimate savings for my fleet?
No — and we would advise against anyone who tells you otherwise. Use the ROI calculator with your own consumption figures, and run a pilot on your own vehicles. The value of this page is that you can see the full spread and judge the evidence yourself, not that it gives you a number to budget against.
What does the CO₂ column mean?
It is the calculated change in CO₂ emitted per kilometre, derived from the measured fuel-efficiency change and the standard emission factor for that fuel (2.32 kg/L petrol, 2.62 kg/L diesel, 3.00 kg/kg LPG). It is arithmetic from the fuel figure, not an independent emissions measurement.
Next

The trials with a documented method

Eight fleet trials where we can show how the measurement was made, over what period and against which baseline — including the one with a small, inconclusive result.

All trial results Measurement methodology Calculate your ROI
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