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Tomorrow Im gonna fill up with 93 octane and go to level 3 and also Im gonna try level 2 what should I bump the timing up on level 2 if I have 93?
1/2 point per octane........93 - 87 = 6.......6 x 1/2 = 3. I would bump it up 3 on level 2 (93 octane). In fact, I run 93 all the time, so if I am towing that is exactly what I do.