2018 head-to-head · Midsize Car
2018 Audi S6 vs Lexus LS
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
AWD · 4.0L 8-cyl turbo · 7-speed dual-clutch · 18 MPG
The 2018 Lexus LS is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,576 a year to fuel (23 MPG), versus $3,292 for the 2018 Audi S6 (18 MPG). That's roughly $716 a year, or about $3,578 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- Audi S6
- Lexus LS
Side by side
| Audi S6 | Lexus LS | |
|---|---|---|
| $3,292 | Your annual fuel cost | $2,576 |
| 18 MPG | Combined efficiency | 23 MPG |
| 16 MPG | City | 19 MPG |
| 24 MPG | Highway | 30 MPG |
| 98 cu ft | Passenger volume | 99 cu ft |
| 16 cu ft | Cargo volume | 13 cu ft |
| 480 g/mi | Tailpipe CO₂ (g/mi) | 387 g/mi |
| 3/10 | EPA fuel economy score | 5/10 |
| 3/10 | EPA greenhouse gas score | 5/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 4.0L 8-cyl turbo | Engine / motor | 3.4L 6-cyl turbo |
| 7-speed dual-clutch | Transmission | 10-speed automatic |
| AWD | Drivetrain | RWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
Audi S6 vs Lexus LS across model years
- Audi S6
- Lexus LS
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Per EPA interior volume figures, the Audi S6 has more cargo space (16 vs. 13 cu ft).
Among 74 2018 midsize cars, the Audi S6 ranks 66th and the Lexus LS 61st for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2018 Audi S6 or the 2018 Lexus LS?
Measured by cost to drive, the Lexus LS. The Audi S6 is rated 18 MPG combined and the Lexus LS 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2018 Audi S6 vs. the Lexus LS per year?
At 15,000 miles a year with $3.95/gal premium gas, about $3,292 for the Audi S6 and $2,576 for the Lexus LS.
Which has more cargo space?
The Audi S6, with 16 cu ft of luggage volume versus 13 cu ft (EPA interior volume index).
Audi S6 vs Lexus LS in other years
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