Adeel3466
Well-Known Member
- Joined
- Jan 14, 2023
- Threads
- 3
- Messages
- 479
- Reaction score
- 442
- Location
- Northern Virginia
- Website
- instagram.com
- Vehicle(s)
- 2024 Mustang GT NP/PP
- Thread starter
- #1
Wanted to know what you all put in your Mustang GTs. I looked up the s550 owners manual and it said that it is designed for 87 but for optimal performance to use 91. Is it better to just go 91 all the time or maybe just use 91 when going to a track or doing other performance tests? What are the pros and cons of each? I have a GT performance pack on order.
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