Thanks. I may have gotten the cart before the horse with my question about cleaning the fuel injectors. That diagnosis came "second hand" from a friend who knows a mechanic. So I think I should ask you if the symptom I'm getting, the engine light coming on when I use regular unleaded gas and going out when I use premium gas, is really being caused by dirty fuel injectors, OR by something else entirely? Sorry to be so troublemsome, I do appreciate your help!