KU40

thanks for all the info. I think I'll steer clear of them. I've heard of that higher octane fuel every few gas tanks idea from some people, but I've also heard that once you put in higher octane you may have to continue to put in that higher octane? I can't remember the reasons though. It wouldn't seem to be the case to me, but I'm no fuel expert. I've also heard that stomping on the accelerator every once in a while to get the RPM's up helps burn off buildup as well. So many ideas floating around out there.

Either way I'm not sure. With my old car I used fuel additives maybe twice and same with the higher octane in the 5 years I had it. For the last year it had a stalling problem while braking at about 5-10 mph. I never had it diagnosed (correctly anyways), but the more I've been thinking about it the more I think it may have been fuel-related with rust or whatnot coming loose, or whatever. But I can't say either the additives or higher octane caused it.

Either way I think I'll just keep what I've been doing with my explorer, just putting in 87 every time. It's got 150k miles (only 3k by me) and it's not broke so I guess I won't try to fix it.