Do you use premium gas?

[ToxSocks]

Originally Posted by Donger

I could be wrong, but I was under the impression that modern cars will reerun the ignition timing to prevent pre-ignition. If so, you don't have to use premium, but the vehicle's performance will suffer.

No idea. But my car has a known timing chain issue so i'd rather not **** with it. I've heard different things. To name a few:

Use higher octane only if the motor is pinging.
Using 91 Octane on an 87 Octane car may cause premature failure of the injectors
Forced induction cars must use 91 Octane or higher.

I've heard a lot of things regarding octane. I'm not really sure what to believe so i just go with what the book says.