MPG Difference between 245 and 265 tires?

Anyone notice or know the difference between Tacomas with 245/75/16 and 265/70/16 tires? Trying to decide what tires to get next and want to know what kind of increase I could get from 245 tires.

 

I lost about 2 MPG going from 245's to 265/75/16

 

yeah like the other person said about 2mpg or 20-40 miles per tank

 

Same overall diameter and same tire, MPG loss would be minimal, about 1-2 MPG tops.

 

Also depends a lot on the weight and tread design. When I had my first 05 4 cylinder it came with 245/75/16's. I was averaging a hair under 24mpg with it. Switched to Michelin's with a conservative tread pattern in 265/70/16 and the mileage didn't change at all. 70k miles later I swapped those out for General Grabber At/2's in 265/70/16 which I loved. But I was then down to about 22MPG and noticed a slight loss in power. But those tires were about 6 pounds heavier each than the Michelin's with a much more aggressive tread. Now I'm back to the sucky AT20's on my current truck in 245/75/16. But I'm getting almost 22MPG on my regular commute. Which is great but I remember vividly how incredibly bad they were in the snow which prompted my change at about 7k miles on my first 05. So I'm looking for a moderately aggressive tire that isn't heavy for a replacement. I'm thinking Hankook dynapro atm's are going to be what I go with when I can pony up for tires and wheels.