Hi folks.. quick question i know this was posted on forums but i couldnt find anything related to my same question. i recently took my gs to the dealer for a oil change but when i got my car back i noticed after i filled up my car with gas on the mileage it didnt say 370 miles left on the display screen. now after a full tank of gas it only says 300? anyone know why this happened?

 

If you increase your average to 26.5 mpg on the current tank, the next time you fill it up, it should be 39x plus. When you fill your tank up, it's calculated based on your last tank average mpg.