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2020 BMW 840i Coupe — 3.0L 6-cyl, S8 automatic, RWD
This 2020 BMW 840i Coupe (3.0L 6-cyl, S8 automatic, RWD) takes premium gasoline. PREMIUM
25
MPG combined (23 city / 30 hwy)
$2,808
est. fuel cost / year (today’s prices, 15k mi)
347 g/mi
tailpipe CO₂
At today's AAA national average price ($4.68/gal, 2026-07-05) — the EPA's own price/date assumption isn't exposed in the public dataset, so we recompute this from the EPA's MPG figure and a sourced current price.
The EPA lists this trim as premium because that's the fuel the manufacturer specified for its mileage test. Many such engines will run on regular with slightly lower power and MPG — but check your owner's manual to see whether premium is required or just recommended.
EPA fuel type: Premium · class: Subcompact Cars · engine: 3.0L 6-cyl turbo · transmission: S8 automatic · drive: RWD · MPG retrieved 2026-07-24.