So kind of funny at 70 MPH the stock tires were running 2 MPH lower then GPS showed. Now the new tires show 1 mph over at 70 MPH. I have made no adjustments in Forescan.
I got my 275/65/20 SL G3's a couple weeks ago. I am hoping the MPG difference is an anomaly. On the stock Hankooks I was getting 23 mpg. Since I switched to the 1/2' taller G3's in SL, I dropped to 18.5mpg. I was anticipating 1-2 mpg drop, not 4.5 mpg The temperature dropped into the 20's the...