People with Duratracs....MPG difference?

I've run a bunch of tanks through the truck since I bought the Duratracks and I can now say that I'm getting consistantly shitty gas mileage.

Before I was getting roughly 19-20 and now I'm getting 17-18. Has anyone else noticed a significant drop?

Not pissed, just curious. It has me considering getting an intake of some sort to help offset the difference.

 

Did you go up in size when you got the Duratracs? That can throw off the odometer a bit and make it appear you are traveling fewer miles to a tank of gas.

 

i went from 265/75 toyo m/t to the 265/75 duratracs and millage stayed the same. never had stock tires so i cant really compare. 23.8 best tank 20.9 average

 

That's a good point. I did go up in size. My speedometer used to read 3mph faster than I was actually going at around 70mph and now it's about dead on. I wonder if I'm really getting similar mileage as I was before with respect to the ground but the odometer thinks differently. I had the stock Bridgestone Duellers before.

 

the bigger tire+more aggressive pattern = worse mileage

I went from 235/75/15 LTX AT2's to 265/65/16 KM2's and from 19 MPG avg to 15-17 avg

 

285/70-17R's here. Mileage dropped from the sticker average of 21/17 to about 18/15. But that's to be expected with the bigger size. Running side-by-side with a stock tacoma on a flat stretch of highway my odometer was 1/10 mile off and speedo was about 5 mph off above 55 and as much as 7 mph off above 75 mph.

 

Did some math using the tire size calculator above. On my truck with the steelies, the stock tire is a 245/75-16. I'm looking at some Duratracs to replace my stock tires, but I like the aggressive look of the 265/75-16's. That equates to a -3.7% difference in revolutions per mile. That means, that if I were getting 20mpg before, I'm only going to get 19 and change now based on nothing but odometer inaccuracy.

I think.

I suck at math, so feel free to correct me if my figgerin' is off. :lol:

 

if you went up in size on the tires, you have to add the mileage difference into your MPG calculation.

 

Sounds about right with the size and weight difference