Post by cousinmike on Mar 15, 2012 21:41:18 GMT -5
I have 3:73 gears, and the mileage was from the overhead. I penciled the first tank at almost 17mpg around town and it had a really dirty air filter. I haven't refueled since coming back from Puyallup to penile it out. I've read that an exhaust and air intake upgrade could increase mileage almost 2mpg.
Post by ramboy1990 on Mar 15, 2012 22:41:04 GMT -5
they can my dads truck we did the exausht and intake the same day and got about 1-1.25 mpg more on the 04.5+ trucks i wouldnt waste your mony on a full system since they have 4inch exhaust all the way back...just cut the cat and muffler out and if you want to run a muffler the diamond eye muffler sounds awesome
"Grandma Betsy" 93 cclb cummins auto 98 seats minor pump mods hy35 turbo 5x0.12 DAP injectors 3200rpm gov spring rebuilt auto. 81k5 vortec 5.7 edelbrock carb and manifold 4 speed. 3/4running gear rear locker on 37"ssr's