Mileage with bigger wheels
08-13-2010, 12:14 AM
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Mileage with bigger wheels
I was just wondering how many miles people are getting from a tank that run 19's? With oem 18's i got around 330miles per tank but now after getting 19's im getting about 280. Just wondering what others are getting roughly. Setup is 19x9.5 with 255/35 and 19x10.5 with 285/35
08-13-2010, 03:24 AM
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a 50 mile per tank reduction is a significant drop from just wheels, assuming they aren't made of lead
my guess is something else has caused the reduction...9 times out of 10, it's the driver
fwiw on my car, built NA motor (DE, non revup, not an HR), 19's (265/285) and a 4.3 final drive, I get ~300 per tank. Perhaps with your new found grip, you've gotten a bit heavier on the throttle?
my guess is something else has caused the reduction...9 times out of 10, it's the driver
fwiw on my car, built NA motor (DE, non revup, not an HR), 19's (265/285) and a 4.3 final drive, I get ~300 per tank. Perhaps with your new found grip, you've gotten a bit heavier on the throttle?
Last edited by Z1 Performance; 08-13-2010 at 03:26 AM.
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08-13-2010, 10:31 AM
#10
I was just wondering how many miles people are getting from a tank that run 19's? With oem 18's i got around 330miles per tank but now after getting 19's im getting about 280. Just wondering what others are getting roughly. Setup is 19x9.5 with 255/35 and 19x10.5 with 285/35
When I went from the 18" OEM wheels to 19" Volks (same sizes are you) I saw my highway mileage drop about 3MPG. Think about it - 3MPG on a 18 gallon tank of gas is a little over 50 miles per tank.
I was able to gain 2 MPG back by switching to synthetic in my transmission and diff.
As the old saying goes - "you have to pay to play". If you want to be a baller with 19" wheels and wide tires, there's a penalty to pay for it.
You didn't mention what wheels you "upgraded" or "downgraded" to. As pointed out before, heavier wheels also cost you some performance aspect. My Volks and PS2s are 11 lbs per corner lighter than OEM so I was able to pick up a little there. Since the 19" wheel/tire setup puts the weight a little further from the axis of rotation, it's pretty much a wash as far as rotational inertia goes (won't slow acceleration down).
Last edited by DavesZ#3; 08-13-2010 at 10:33 AM.
08-13-2010, 11:49 AM
#13
Virtually all of the tire is inside the wheel well so it's not really that big of a problem, especially at our relatively slow speeds. Unlike an F1 car where aerodynamics plays such a large role, their huge exposed tires at 200+ MPH there is significant drag.
