Originally Posted by Mr Boost

I've had my 08 Csrt4 for about 3 weeks now ive been running 87 octane and have noticed slight knocking and hard idling, well yesterday i was on empty and just for kicks happend to open my users manual and i found out that im supposed to run 93 octane. Well i've only ran the car hard about 6 times for short bursts i sometimes got in the redline zone when i'd accidently miss a gear, ever since yesterday i've started filling up with 93 octane, i was wondering if i will be ok.