Will 17 inch rims decrease my fuel economy?

 

If the tire is wider than stock, then yes, but not by much.

If the tire is a larger diameter, the mileage will get better--if it's smaller, the mileage will get worse. But you won't see it, since the odometer will be out of calibration.

If the wheel is heavier than stock, the power will be a bit less for accelerating, and the mileage may go down slightly, but not much.

 

If the tire diameter is larger you will lose low end power (acceleration) how much depands on how much over the stock size you go

 

heavier anything=less mpg

 

I have 18s and get about 1.5 mpg less than with the OEM steelies.

 

what size are the OEM steelies/caps?

i want rims, but i dont want to go too big or too small

 

Are you sure you are getting less MPG? Depending on tire size: Did you take into consideration your odometer error with the taller tires?

 

I have 20's and just got 31.5 mpg on my last fill up. All city driving with AC on, and auto tranny. I also calculate for the difference in my odometer for the larger wheels. Key to good milage I found is to not floor it when I take off, and let it shift at 3000 rpm's or below.

Mav

 

Well, a 185/60/15 vs. a 215/35/18 is 0.8% difference. That's not much at all. I can't imagine that'd impact my actual MPG much if at all.

 

what about road noise? That's my main concern...