Hey guys, after buying the plugs and wires, I've been hesitant to install them for the following reasons. The car is running fine, but I think that might just be because any degradation in performance could be because over 50,000 miles, I may not have noticed it because it is so gradual. I have a friend who works for Matco Tools who says my GM is built to last 100,000 miles before performing this kind of maintenance. After looking through the threads on this topic, I don't really see a solid number as far as mile when is good time to do this. Is 50,000 too soon? Would I be better off flushing the system with some fuel additive and a fresh tank of 91 octane? Would any gain I get from installing the new plugs/wires be worth it in the long run?
Sorry to bring this back to life, but I'm about to take a 1,500 mile round trip and want to get the best performance right away.