Does premium gas extend the life of a car?

Answer 1

The engine maybe but not the whole car. If you get a "knock" in the engine when you use a lesser grade fuel then you need to use premium. Also some manufacturers suggest premium and some folks claim a tune up will last longer with premium. Personally I have never used premium in anything except a couple of really high performance cars. For cars that I used on a daily basis I never found one that I couldn't run on regular gas simply by adjusting the timing. Newer cars the computer will automatically adjust the timing for you. With premium gas running anywhere from twenty to forty cents higher a gallon....it just isn't worth it.