Quote:
Originally Posted by Andyinchville1
I have a 2003 Jetta Wagon TDI (5 speed) and on factory steelies and ecopia 195-65R15 tires @ 44 psi I used to average about 47 - 48 MPG ..... I switched to lightweight wheels (Volk TE 37) and larger tires (215 - 75R15 Hankook tires at 51 psi ( I'll have to look at the model) ) and got basically about 9 percent better fuel mileage
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I am curious how you measured your miles, before and after. A change in tire diameter should throw off your odometer. I have used a GPS and found the VW speedometer/odometer to be slightly off even with the original tire size. That said, a taller tire should make your mpg
worse on the factory odometer, right?