I switched to the 195's/65 and now I'm not sure how to read my MFD mileage. I purchased 4 Kuhmo 758 PowerStars but I can't seem to locate the numbers that help calculate the differences. Can anyone help me out with this? ps.....before I switched I was avg about 55mpg per my MFD. After the switch I'm struggling to get my MFD to 47mpg.