[joey]

MPG is a squirrelly number. There are too many variables that can change the number. I once had the same thing happen to me after an oil change. 24mpg on the freeway before the oil change, then 20mpg after the oil change. I was certain the dealer had put the wrong oil in the car. Then a week later all of sudden I am once again getting 24mpg.

I have also seen unbelievable high mpg averages posted in some LXforums surveys.

Since day one, my average is consistently 15mpg. About 24mpg on the freeway, and about 12mpg around town.

What is strange is the TSB the dealer applied was issued November 2004.
Seems strange it would show up this late. But if it fixed the problem, that is all that counts.