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Premium vs. Regular
Would consider the supercharged 3.8 that is in a number of GM cars, from about 1991 to 1996 "modern"? I have seen quite a few of these damaged, burned pistons, due to regular gasoline. The newer supercharged 3.8's do not do this. Perhaps they are the modern ones.
Today: This Mazda Miata is making my wife sick!
Don't bother trading it in on a Honda Fit. I got rid of one of those for the same reason.