Hey is it safe to use 100 octane on my car?

 

Íf your car is stock, I'm sure you won't see any improvement by using anything above 95, if that. Myself, I just use 92, because it's readily available almost anywhere around here. But spending the extra $$$ for 100, for a stock Z, is not worth it in my opinion. All that extra oil might even be bad for a stock engine, but I have never seen any proof confirming this.

 

it is ok if its unleaded, but you will see no performance gain unless you have lots of knock. im sure youll be fine with 93.