- Newest year: 2018
- Gas
- Large cars
2018 Audi A8 MPG & Fuel Cost
2 configurations · 19–22 MPG combined
15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 4 of 10 large car configurations, MY2018. Ranked against all rated configurations, not sales-weighted.
2018 Audi A8 at a glance
The 2018 Audi A8 has 2 configurations in the EPA database, rated 19–22 MPG combined. The most efficient is the L 3.0L 6-cyl supercharged AWD at 22 MPG, which costs about $3,600 a year to fuel at premium gasoline $5.36/gal (U.S. average, Sep 2026). Annual fuel cost across the configurations runs from $3,600 to $4,240, a $640 difference. The L 3.0L 6-cyl supercharged AWD costs less to fuel than 4 of 10 large car configurations rated for MY2018 (class median $3,320 a year).
What the 2018 L 3.0L 6-cyl supercharged AWD costs to drive
Per month
$300
$3,600 a year ÷ 12
Per 25 miles
$6.00
Per 100 miles
$24.00
Five years
$18,000
5 × the yearly cost, prices held at today's level
vs the large car median
$280more a year
Class median $3,320 a year, MY2018
Based on 15,000 miles a year and premium gasoline $5.36/gal (U.S. average, Sep 2026).
2018 Audi A8 MPG
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| L 3.0L 6-cyl supercharged (Most efficient) | 3.0L 6-cyl supercharged | AWD | 19 | 29 | 22 | $3,600 |
| L 4.0L 8-cyl turbo | 4.0L 8-cyl turbo | AWD | 16 | 26 | 19 | $4,240 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Fuel cost by state
Yearly cost of the L 3.0L 6-cyl supercharged AWD: $4,290 in California and $3,120 in Texas, a $1,170 difference.
- California $4,290
- Washington $4,040
- New York $3,550
- Florida $3,290
- Texas $3,120
Similar cars
Closest combined MPG among MY2018 large car models.
Generations
Frequently asked questions
How does the 2018 Audi A8 compare with the previous generation?
The previous generation (2010-2017 Audi A8) is rated 15–28 MPG combined and costs $3,340–$5,360 a year to fuel; the 2018 model is rated 19–22 MPG and costs $3,600–$4,240 a year.
What gas mileage does the 2018 Audi A8 get?
EPA rates the 2018 Audi A8 at 19–22 MPG combined across 2 configurations. The most efficient, the L 3.0L 6-cyl supercharged AWD, is rated 22 MPG combined (19 city / 29 highway).
How much does it cost to fuel a 2018 Audi A8 per year?
Driving 15,000 miles a year at premium gasoline $5.36/gal (U.S. average, Sep 2026), the L 3.0L 6-cyl supercharged AWD costs about $3,600 a year. Across all 2 configurations the cost runs $3,600–$4,240 a year. That is a $640 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2018 Audi A8 100 miles?
About $24.00 per 100 miles for the L 3.0L 6-cyl supercharged AWD at premium gasoline $5.36/gal (U.S. average, Sep 2026), and between $24.00 and $28.27 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2018 Audi A8 more efficient in the city or on the highway?
The L 3.0L 6-cyl supercharged AWD is rated 19 city and 29 highway MPG, so it is more efficient on the highway, by 10 MPG.
How does the 2018 Audi A8 compare with other large car configurations?
The L 3.0L 6-cyl supercharged AWD costs about $3,600 a year to fuel, $280 more than the class median of $3,320, and less than 4 of 10 large car configurations. The comparison covers all 134 rated large car configurations for MY2018, not weighted by sales.
Is the 2018 Audi A8 different from the 2017 model?
The most efficient configuration stays at 22 MPG. Its annual cost stays at $3,600. EPA lists 2 configurations for 2018 against 2 configurations for 2017. See the 2017 Audi A8 for that year.