steve2150
Member
- First Name
- Stephen
- Joined
- Jul 21, 2025
- Threads
- 4
- Messages
- 24
- Reaction score
- 19
- Location
- Punta Gorda
- Car(s)
- 2025 Z Performance
- Occupation
- Retired
- Thread starter
- #1
Have 2025 Performance with 9 speed auto. Have been using Shell Premium and averaging about 28 mpg. Switched to Chevron Premium and mpg continued to drop, now at 22.5 mpg. Seems like my Z does not like Chevron.