don't be a dickdelsol17 said:aren't si vtec anyways???hello are ya dumb??
AndrewD65 said:Using higher Octane is good anyway if you plane on doing a lot of engine work in the Future. A.k.a Turbo.
Negative. It helps resist pre-ignition due to pressure. High compression tends to promote pre-ignition. Higher octane helps resist pre-ignition due to pressure, allowing the flame wall to move through the vapors. From the article:higer octane=burns slower