thanks for the info., outahere.outahere said:There is an excellent article about this in the March issue of Trailer Boats magazine. According to a GM drivetrain engineer, the lower ratios have very little effect on city mileage, but at 70mph you may lose 1.5mpg by going to a 4.10 rear end in a Chevy Silverado. He stated that the biggest fuel economy killer is speed. The faster you drive, the worse your mileage. In their testing, a pickup that gets 19.5mpg at 52mph gets only 14mpg at 70mph.
LOL Pluckyew, how have you managed to avoid the CHP? Are you using a radar detector?pluckyew said:thanks for the info., outahere.
since i usually drive around 80~85 mph i expected the 14~15 mpg on the highway