Hi all, new to the site also
What I have to add fits this thread...
my truck has 3.0 came fact w 3.73 and 15 in tires. The guy I got it from added bl and axle lift, 4.56 gears.
I changed to 245/70-16 tires/alum wheels and had approx 21 mpg. Then swapped back to 3.73 and mileage is 17. It doesnt make sense to me.