[mikelebo99]

I am experiencing what seems to be knocking under hard acceleration from a standing start. This does not seem to affect performance but it is rather noisy. I use 93 octane about every 3 refill. I am going to use 93 for the next couple of refills, but with gas prices the way they are, it is over $30 to fill her up. Does anyone have any other suggestions? How does this engine deal with aftermarket fuel additives?