Okay. Since the subject is still alive I have a question.
quote by PhilD:
Some high performamce vehicles with high compression engines do need high octane gas to run at peak effiency, although you can often run 87 octane and never noticed it unless you drive real hard.
The octane value is no indication of how much energy is in the gas, nothing to do with it. Most race gas has no more energy than regular gas! Even methanol contains only 10% more energy than regular gas. The real benefit of race gas and methanol is that they allow you to run a much higher compression ratio. It is that higher compression ratio which is allowing more power to be produced, not anything in the gas.
My 460 C.I.D. pings really bad if I don't run high octane. It must have a higher compression ratio. ???
Why do people still try to run Regualr (leaded) gas in their older cars. (like old vettes)?
Is that a misconception too?
I'm old enough to remember leaded fuel. Barely.
