Recent content by ace22398

I would imagine that your elevation has some kind of effect on it as well. My MPG is pretty stable, but I did get the new tires in May this year. If I did wanted to get the speedo calibrated, is that something I need to take to the dealer? at this point im not too worried about it, but possibly...

What is 3% of 10mpg? 14mpg? Not significant enough to show the kind of difference I've noticed. But thanks for your input, it has been noted.

MPG calculations are not being done using my speedo, just simple mileage to gallons used. it will not matter if my speedo is calibrated. here is an extensive fuel history from my fuelly app. https://www.fuelly.com/car/ram/2500/2021/ace22398/1164548

I appreciate all the replies, this makes me feel a little more comfortable. I though it was because I replaced the firestones with the slightly larger size coopers.

I did not need to calibrate, as i check different gps speed they ready accurately to the speedometer.

While towing my 8000 lbs trailer to San Diego from AZ, I was averaging 10-11 mpg at 65-70 mph. no real head wind to affect it, and the only modification done to the truck was slightly larger tires (285/65r20 instead of stock 285/60r20). this seems low as I use cruise control to hold a steady...