New tires, mileage problems
10-23-2005, 04:32 PM
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New tires, mileage problems
I just got a great deal on four new Toyo mud terrains, 265-75R16, for $50 each. I had them mounted yesterday and went on a 200 mile roadtrip, no towing. I only got 16.5 MPG, as opposed to 18.5 to 19 with the stock Michelins of the same size. I had no idea there would be a mileage decrease with the tire change. Now I am looking to dump the Toyo's and get some more Michelins Or maybe Pirelli's. What do you 2wd guys use on your rigs?
10-23-2005, 06:14 PM
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Originally Posted by cstmfabman
I just got a great deal on four new Toyo mud terrains, 265-75R16, for $50 each. I had them mounted yesterday and went on a 200 mile roadtrip, no towing. I only got 16.5 MPG, as opposed to 18.5 to 19 with the stock Michelins of the same size. I had no idea there would be a mileage decrease with the tire change. Now I am looking to dump the Toyo's and get some more Michelins Or maybe Pirelli's. What do you 2wd guys use on your rigs?
I don't think the tires would make a 2-3 mpg differance, but why mud tires on a 2wd??
10-23-2005, 07:43 PM
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Check the pressure, first. My Buckshot mudders have a max pressure of 50 psi; the tire shop left them at ~35 and my mileage fell 1.5 mpg. I aired them up to 45 and got most of that back.
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10-24-2005, 08:54 AM
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Tire pressure is always your first check for mad MPG. Always.
Then, keep in mind that those Toyo M/Ts are big, heavy, gnarly tires. They weigh probably more than any other 265/75r16 tire you can find!
Also, these Toyos are E rated, so they can handle the higher tire pressure like your stock tires. Run them up to 55F/50R and watch the MPG come back-- at least in part.
The aggressive tread does have some mpg penalty, but it shouldn't be THAT much-- certainly not when you kept the same size!
jmo
Then, keep in mind that those Toyo M/Ts are big, heavy, gnarly tires. They weigh probably more than any other 265/75r16 tire you can find!
Also, these Toyos are E rated, so they can handle the higher tire pressure like your stock tires. Run them up to 55F/50R and watch the MPG come back-- at least in part.
The aggressive tread does have some mpg penalty, but it shouldn't be THAT much-- certainly not when you kept the same size!
jmo
10-24-2005, 09:27 AM
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Also keep in mind that a larger tire is going to throw off your speedo and therefore your odometer. There are a few options for fixing this. You can go to the dealer and have them change it 
, get a hold of a superchips programer and change it yourself, and if you're a cheap SOB like me, you can have someone drive next to you at a designated speed and see how much it will be off at different speeds. I figured my speedo is off by 10%, so I account for that when figuring out mpg.
, get a hold of a superchips programer and change it yourself, and if you're a cheap SOB like me, you can have someone drive next to you at a designated speed and see how much it will be off at different speeds. I figured my speedo is off by 10%, so I account for that when figuring out mpg.
10-24-2005, 01:08 PM
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Originally Posted by dodgediesel4x4
Also keep in mind that a larger tire is going to throw off your speedo and therefore your odometer
Originally Posted by cstmfabman
Toyo mud terrains, 265-75R16. . . . with the stock Michelins of the same size.
phox
! Its Monday, give me a break Phox!!
10-24-2005, 07:42 PM
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2 mpg is alot. My guess is air pressure. Also could be winter fuel... I'd make sure of the pressure and run a couple of tanks before I bought new tires!! They will probably not give as good mileage as the Michelins but I sure don't think it'd be 2 mpg!
10-25-2005, 12:32 PM
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I switched from the original OEM Michellins to the SUV all terrain Michlies because I could stand the capacity reduction and the original traction SUXED. I could lock em up on dry road and slide like on sand. The ride got a little softer too. The big drawback on them was they needed replacing w/less the 45K miles.
Now I got a set of Goodyear Silent armor Wranglers. First thing I noticed is less rear end chirping going around lowspeed corners and less squeal on offramps. Mileage is about the same (19 city- 24/26 hwy). I'm all about traction so since I don't load my truck down much I'll live with these happily.
I did throw 2 ton of crush and run in the back to do a walkway at home. The thing squated and wobbled but I only had to go about 10 miles so no biggie.
Now I got a set of Goodyear Silent armor Wranglers. First thing I noticed is less rear end chirping going around lowspeed corners and less squeal on offramps. Mileage is about the same (19 city- 24/26 hwy). I'm all about traction so since I don't load my truck down much I'll live with these happily.
I did throw 2 ton of crush and run in the back to do a walkway at home. The thing squated and wobbled but I only had to go about 10 miles so no biggie.
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