Petro wrote:The octane rating just refers to the anti-knock performance of the engine. It becomes more important when you move to engines with higher compression ratios or things like superchargers or turbochargers as it prevents premature detonation in the cylinder.
Yeah, I know that. I just always use "87 octane" to refer to what most now call regular gas, because, to me, "regular" is leaded gasoline, no matter how many decades it's been. Sheesh, I'm old.