07 Mustang GT, Mobil1 5W-20, 5000-OCI

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Originally Posted By: Steve S
Why the race gas is the engine modded?


I have nade a few modifications. nothing beyond simple bolt-on upgrades. I add a small ammount of race gas to bump the octane just enough to give me a cushion from detonation. I only do this when I am actually racing.
 
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