Does the 2026 Cadillac CT5 need premium gas?
Yes. Premium.
$277extra a year
- Premium listed for the Premium Luxury RWD.
- All 9 trims list premium.
- Required or only recommended: the data does not say.
- 64% of 55 sedans (2026) list premium.
12,000 miles a year. Gas $3.20. Premium $0.60 more.
| Trim | Engine | Grade | Mpg | Regular, a year | Premium, a year |
|---|---|---|---|---|---|
| 4dr Sdn Premium Luxury RWD | 2.0L 4cyl | Premium | 26 | $1,477 | $1,754 |
| Premium Luxury RWD | 2.0L 4cyl | Premium | 26 | $1,477 | $1,754 |
| 4dr Sdn Sport RWD | 2.0L 4cyl | Premium | 26 | $1,477 | $1,754 |
| Sport RWD | 2.0L 4cyl | Premium | 26 | $1,477 | $1,754 |
| CT5-V 4dr Sdn RWD | 3.0L 6cyl | Premium | 21 | $1,829 | $2,171 |
| V V-Series AWD | 3.0L 6cyl | Premium | 20 | $1,920 | $2,280 |
| V V-Series Blackwing RWD | 6.2L 8cyl | Premium | 15 | $2,560 | $3,040 |
| Premium Luxury AWD | 2.0L 4cyl | Premium | 24 | $1,600 | $1,900 |
| Sport AWD | 2.0L 4cyl | Premium | 24 | $1,600 | $1,900 |
Rivals
| Car | Cheapest trim | Grade |
|---|---|---|
| 2026 Cadillac CT5 | Premium Luxury RWD | Premium |
| 2026 Mercedes-Benz C-Class | C 300 RWD | Premium |
| 2026 Dodge Charger | R/T AWD | Premium |
| 2026 Audi A5 | Premium AWD | Premium |
| 2026 BMW 3 Series | 330i Sedan RWD | Premium |
| 2026 Lexus ES Hybrid | ES ES 350h Premium AWD | Regular |
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