No, on the contrary. The higher octane you use, generally the less the engine suffers, the better fuel economy you get out of it and the smoother it runs. All of which translates into a longer lasting engine. If you also take care of it in other ways as well. I would say that recommendation by ford for the use of 87 octane means don't use anything less.
The best running truck I ever saw was a 1972 ford f100. The owner regularly ran 100 octane, low lead content aviation fuel in it. That engine was CLEAN!
Unfortunately 93 octane is expensive.
Saturday, January 13th, 2007 AT 3:47 PM