Quote:
Originally Posted by meltman
Only if knock is detected and the ECU retards the ignition advance.
So honestly... probably no difference in reality.
|
The owner's manual says fill with 93, 91 is okay if that's all you have, but you may hear slight knocking. If the manual admits that you may get some knocking with 91, then I think it's safe to say there should be a small difference, easily perceptible or not.