Re: MPG help anyone?
Your new tires are 10% bigger. So if you want to hand calculateyour mileage you would add 10% to your distance travelled. YOu go 300 miles on a tank, you actually went 330 miles. So divide your gallons used by 330 instead of 300. You should see a 2 mpg improvement over what the evic says.
Either way those 285's are big and heavy and need more energy to turn over. = less mpg's.
Stock tire size, lightweight tires, mild tread pattern, air dsm on, roof rack bars off is still your best mpg combo. I get 23 on the highway like that.
2008 Laredo X 4.7 with 245/70-17 AT2 RC lift
2013 Hemi Durango Crew