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Tire change - MPG loss

revitup

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revitup Enthusiast

revitup

Posted
Posted

I recently installed a set of Bridgestone Revo’s to replace the worn out original Firestone Wilderness AT’s (same size) on a 2001 Z71 ext cab, 5.3. I’ve experienced a 3 MPG loss in gas mileage coincidental with the tire change. It also seems to be downshifting to hold speed on hills in places where it didn’t before. Dealer put it on the analyzer, no codes. Changed the fuel filter and cleaned injectors, no change. Tires were expensive enough without having to continue to pay for them each time I fill up. Went from about 16.5 MPG in mixed driving to 13.5 seemingly overnight. I have lost 60 miles to a tank of gas. Anyone else experience a big change in mileage when installing these tires? Any idea what else could have happened?

kdm101 Enthusiast

kdm101

Posted
Posted

I don't think I lost that much, but I too experienced lower mileage when I switched the tires. I think the tires are just that much heavier than the P-rated factory stuff. I had the standard "Americrap" tires on mine.

 

It's also possible that you just got your first tank of oxygenated winter fuel too if they do that in your area. My last tank's MPG was really crappy compared to the previous few weeks. It's either the winter fuel or the fact that my battery and cable were on their last breath (just died this past weekend) and was causing the computer to have fits.

lrymal Senior Enthusiast

lrymal

Posted
Posted

Incredible difference, especially since the size is the same. On my '03 a few years ago, when I switched to the Dueler AT Revos, my gas mileage improved by about 1 - 2 mpg. I'm wondering if the tire pressure is correct?

gmcjoe Senior Enthusiast

gmcjoe

Posted
Posted

I can see tire pressure having an effect, but not the tires themselves. Maybe if you went to some very knobby tires...

redvett Senior Enthusiast

redvett

Posted
Posted

The tires selected by the MFR's are the best for fuel economy, smooth ride & handling. Just because the tire is the same size does not mean its the same as far as rolling restance.

flatlander Enthusiast

flatlander

Posted
Posted
I recently installed a set of Bridgestone Revo’s to replace the worn out original  Firestone Wilderness AT’s (same size) on a 2001 Z71 ext cab, 5.3. I’ve experienced a 3 MPG loss in gas mileage coincidental with the tire change.  It also seems to be downshifting to hold speed on hills in places where it didn’t before. Dealer put it on the analyzer, no codes. Changed the fuel filter and cleaned injectors, no change.  Tires were expensive enough without having to continue to pay for them each time I fill up. Went from about 16.5 MPG in mixed driving to 13.5 seemingly overnight. I have lost 60 miles to a tank of gas.  Anyone else experience a big change in mileage when installing these tires? Any idea what else could have happened?

 

 

 

:chevrolet: Noticed that when I switched from the factory 'highway treads' to a Kumho LT rated tire with more aggressive tread, that I too lost gas mileage. Seems like the loss was on the order of 1.5 MPG. I remount the highway treads for the summer months and the gas mileage increases. Now it may be a seasonal deal but even on warm days in the spring and fall the mileage is less with the more agressive tires. It may be a difference because of gasoline blends for winter but I don't think so.

Mark_in_Tulsa Senior Enthusiast

Mark_in_Tulsa

Posted
Posted

Does anyone know when they are going to force the tire co.'s to label each tire rolling resistance? I remember reading that Big Brother was going to mandate the tire manufactures to get independent testing on each tire on their rolling resistance. So we as the consumer can use that on helping us pick out a tire that won't kill our MPG.

CapitalTruck Senior Enthusiast

CapitalTruck

Posted
Posted

In addition to rolling resistance, there is up to a 3 pound weight difference between tires (from what I can tell). I compared my stock Wrangler STs to pretty much every other tire at Tire Rack.com The ST's are only 31 pounds. Everything else is about 3 pounds more. I'm sure that would play at least a small role.

redvett Senior Enthusiast

redvett

Posted
Posted
In addition to rolling resistance, there is up to a 3 pound weight difference between tires (from what I can tell).  I compared my stock Wrangler STs to pretty much every other tire at Tire Rack.com    The ST's are only 31 pounds.  Everything else is about 3 pounds more.  I'm sure that would play at least a small role.

 

 

 

 

Thats a very good point. Every pound counts even unsprung weight. Thats exactly why the MFR's watch every ounce. Areodynamics are also a big part in fuel mileage.

Cranky1 Enthusiast

Cranky1

Posted
Posted

I think 3 mpg is a huge loss for changing tire brands. I don't know what size tires you are running.

 

If you compair a Firestone Wilderness AT 265/70R16 that weighs 36 lbs and takes 681 rev's per mile VS Bridgestone Revo's that weighs 41 lbs and takes 679 rev's per mile, there is close to a 15% weight difference per tire. As per tire rev's per mile they are very simular by 2 tire rev's, but not taking into consideration that your old tires had been wore out. Also both brands of tires are max 44psi.

 

A friend of mine put Revo's on his truck and his mileage went up 1 mpg, he had crappy Generals. I think it's a combo of cold weather and gasoline blends.

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