Stupid Fuel Mileage Questions

[jeff's88silverado]

I dont believe A/C really makes a difference in these truck and i get around 16-18mpg

But ill find out when it gets cooler and ill drive with the windows down for the first time. LOL

 

[frito-bandito]

I agree now, my biggest increase in MPGs came when I finally did a tune up, its a whole new animal now!

 

[hiredgun8]

Without AC on all summer.....14.5MPG
Fixed AC and ran all last week....12MPG

Makes a difference on mine for sure.