Does the 2008 Audi A6 quattro take premium or regular gas?

The EPA lists the 2008 Audi A6 quattro 4.2L 8-cyl, S6 automatic, AWD as taking premium. Combined MPG is 18, and at today's gas prices that's about $3,900 a year in fuel.

← all 2008 Audi A6 quattro trims

2008 Audi A6 quattro — 4.2L 8-cyl, S6 automatic, AWD

This 2008 Audi A6 quattro (4.2L 8-cyl, S6 automatic, AWD) takes premium gasoline. PREMIUM

MPG combined (16 city / 23 hwy)

$3,900

est. fuel cost / year (today’s prices, 15k 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.

Other 2008 Audi A6 quattro trims

Trim	Fuel	MPG	Fuel/yr
3.1L 6-cyl, S6 automatic, AWD	PREMIUM	20	$3,510

EPA fuel type: Premium · class: Midsize Cars · engine: 4.2L 8-cyl · transmission: S6 automatic · drive: AWD · MPG retrieved 2026-07-24.