Just finished installing my new radiator, so I figured while I was under there I'd change the oil real quick. I added the usual 4 quarts and it was still reading low after I let it idle for 5 mins. Ended up having to put a 5th quart in...I think I usually end up putting more than 4 quarts in, but I honestly cant remember. I can't see any obvious oil leaks, so Im wondering if another quart could harm the engine at all?

 

4.25~ gsr
4.00~ non vtec
yes adding too much oil will harm the engine