Best by Class

Starting with the latest model year, these vehicles scored highest in their vehicle class.

Year	Make	Model	Specification	Emission Standard	MPG City	MPG Hwy	Green Score	Class Ranking	Class
2020	Mini	COOPER S HARDTOP 4 DOOR	2.0L 4, auto [P]	LEV-III SULEV30 / Tier 3 Bin 30	26	35	52	Above Average	Subcompact Cars	Details
2020	Mazda	MX-5	2.0L 4, auto [P]	Tier 3 Bin 125	26	35	52	Superior	Two Seaters	Details
2020	Audi	A4	2.0L 4, auto [P]	Tier 3 Bin 70	27	35	51	Average	Compact Cars	Details
2020	BMW	330i	2.0L 4, auto stk [P]	LEV-III SULEV30 / Tier 3 Bin 30	26	36	51	Average	Compact Cars	Details
2020	Chevrolet	SONIC	1.4L 4, auto stk	LEV-III ULEV70 / Tier 3 Bin 70	26	34	51	Average	Compact Cars	Details
2020	Chevrolet	SONIC 5	1.4L 4, auto stk	LEV-III ULEV70 / Tier 3 Bin 70	26	34	51	Average	Compact Cars	Details
2020	Honda	CIVIC 2DR	2.0L 4, manual	LEV-III ULEV125 / Tier 3 Bin 125	25	35	51	Average	Compact Cars	Details
2020	Honda	CIVIC 4Dr	2.0L 4, manual	LEV-III ULEV125 / Tier 3 Bin 125	25	36	51	Average	Compact Cars	Details
2020	Hyundai	Veloster	2.0L 4, auto stk	LEV-III ULEV70 / Tier 3 Bin 70	27	34	51	Average	Compact Cars	Details
2020	Hyundai	Veloster	1.6L 4, manual	LEV-III ULEV70 / Tier 3 Bin 70	26	33	51	Average	Compact Cars	Details
2020	Mazda	CX-3	2.0L 4, auto Awd	LEV-III SULEV30 / Tier 3 Bin 30	27	32	51	Average	Compact Cars	Details
2020	Mazda	MAZDA3 4-Door	2.5L 4, auto stk	LEV-III SULEV30 / Tier 3 Bin 30	26	35	51	Average	Compact Cars	Details

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auto cvt

denotes continuously variable automatic transmission.

auto stk

denotes manually adjustable automatic transmission

[CNG]

denotes Compressed Natural Gas

[P]

denotes premium gasoline.

[D]

denotes diesel

Emission Standards:

A listing with two emission standards (e.g., Tier 2 bin 5 / ULEV II) denotes a single vehicle carrying both a federal and California emission certification. Green scores for such listings reflect the cleaner of the two certifications.

Battery-Electric Vehicle Fuel Economy:

Fuel economy for pure battery-electric vehicles is provided in miles per kilowatt-hour.

Plug-in Hybrid Fuel Economy:

Fuel economy for plug-in hybrids is provided in miles per gallon for gasoline operation and in miles per kilowatt-hour for electric operation.

"...It's easy-to-use rating system makes it a snap to see the green from the mean. So enlighten your mind and free your lungs and check out ACEEE's Green Book before you buy."

Motor Week, Maryland Public Television

"For those of you who are more inclined to buy green than you are to drive through it as fuel prices rise, I can recommend no better resource than ACEEE's Green Book...[It] offers solid, practical, well-researched, balanced advice."

Warren Brown, Washington Post

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