Originally Posted by dpando1
So filling up with a premium fuel would actually improve performance? Meaning the car knows it has premium fuel and adjusts for it?
For example, the Mustang 5.0 is listed at 420hp(premium), and 402hp(regular).
305 @ 6,500 rpm (3.7L V6)
402 @ 6,500 rpm (5.0L V8 regular fuel)
420 @ 6,500 rpm (5.0L V8 premium fuel)