I am currently running OSECU stage 2 91 octane in my 06 wrx. I only run 93 octane and was told by another member that my car was running very strong.
Here is a little background info that may be useful to anyone with suggestions...
The map is tuned to hit target boost of 18psi. I was overboosting to 20 with no signs of knock.
Is it wise/safe to advance my timing slightly to make better use of the 91 octane gas I have access to?
Thanks.