I bought my car "new" Oct. of 06. Aug. 21st of 07 I had the oil changed @ 2,034 miles. The car only has 4,393 on it & the double service wrenches are on showing 41 miles over due. I'm sure the FSS must have a time limit on it as well as what I read in the "sticky FSS thread" , although I do drive it like it's meant to be driven . With the new synthetic oil I wouldn't think it would break down much over time. So I guessing what I'm asking is what you would do, get it changed or just reset it & drive.