Well sure it "recognizes" the clean oil and will extend the oil change out even further (until it runs out on time, in which case your dash warning will show a clock emblem and say something like "Service B due in 30 days", but it also of course it does recognize the miles that have been driven since the service indicator was last reset. The system isn't so smart that the car "knows" that the work was performed, it only "knows" the work was done when the FSS was reset. (And even then, there is no way the car really "knows" if the work was actually done or not, we all hope it was.). It takes alot of info into account when calculating the maintenance interval, but certainly one of the key factors is miles driven. All the other factors besides miles travelled are just minor trims up or down. I can try finding a list of factors taken into account when calculating the maintenance interval.

Gilly

I agree Gilly, I wouldn't expect the miles remaining to jump up automatically after the change if it wasn't reset. If this were the case then why would it need to be reset ever? I'm not worried that they didn't change the oil.

I brought it in with 2400 miles remaining and it still said 2400 miles after a day of driving it. Probably would have just taken longer to get down to 0 miles left.

Randy

Randy,

I believe that the minimum increments that the FSS displays is 100 miles. Therefore you will need to drive around 100 miles for the FSS to display 2300 miles.

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Ray
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles