Does the 2021 Mercedes-Benz GLS need premium gas?
Yes. Premium.
$343extra a year
- Premium listed for the GLS 450 4MATIC AWD.
- All 2 trims list premium.
- Required or only recommended: the data does not say.
- 50% of 134 SUVs (2021) list premium.
12,000 miles a year. Gas $3.20. Premium $0.60 more.
| Trim | Engine | Grade | Mpg | Regular, a year | Premium, a year |
|---|---|---|---|---|---|
| GLS 450 4MATIC AWD | 3.0L 6cyl | Premium | 21 | $1,829 | $2,171 |
| GLS 580 4MATIC AWD | 4.0L 8cyl | Premium | 18 | $2,133 | $2,533 |
Rivals
| Car | Cheapest trim | Grade |
|---|---|---|
| 2021 Mercedes-Benz GLS | GLS 450 4MATIC AWD | Premium |
| 2021 Cadillac Escalade | Luxury RWD | Premium |
| 2021 Lincoln Navigator | Standard 4x2 | Premium |
| 2021 BMW X7 | xDrive40i AWD | Premium |
| 2021 Maserati Levante | AWD | Premium |
| 2021 BMW X4 M | AWD | Premium |
| 2021 Cadillac Escalade ESV | Luxury 2WD | Premium |
What this cannot tell you
Check the fuel door or manual before you fill.
Gas prices and the premium gap change by state.
- 2 or more sources
- 1 source
- Model-level, rule or estimate
- Sources disagree