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89 Metro XFI - MPG Decrease w/ Larger Tires
So I'm pretty confused. I replaced my 12" rims with 13" ones and my MPG has dropped by 3-4 mpgs.
I got 155/80 R13's and am now pulling 49mpg's (last two tanks). Back on the R12's I was getting 52-53mpgs.
Driving hasn't changed (actually driving a bit slower to compensate for the 2mph increase the larger wheels/tires produce). No other mods besides the wheels and tires.
What's going on??
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