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#5: 10-02-2013, 07:41 PM
jhow257415's Avatar
Title: Member
Location: Albany,NY
Car: 2007 5MT
Posts: 139
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Assuming you are using the cars MPG readings on the dash!!! When you reset the odometer trip A or trip B (typical after an oil change), the ecu resets the MPG reading on your dash board! This happens to me every 3k miles when I change the oil. The more miles I drive the more my MPG increases. I have had as low as 19mpg in the first 100 miles after a change (city driving) another time I've had as much as 28mpg in the first 100 miles. Basically the odometer needs miles stored in order to calculate an MPG!