| I really didn't do it for the mileage increase I did it for the lubricity and fact that it keeps the regens to a minimum and the EGR deposit build up down. The best up side is that the engine temp and EGT stay down pulling long steep hills.
I saw a decrease in the EGT by 200 and the engine by 40 degrees. I also added to my tranny, diffs, and transfercase. The tranny temp went from 199 degrees on a 6% with 8k down to 149 degrees.
Next is the engine oil.
__________________  08 Chevy Silverado 2500HD Crew 4x4
6" Fabtech Lift, Pro Comp 35" Tires Extreme A/T & wheels
ATS Extreme Trans w/CoPilot
Quadzilla Stealth 2
4" Turbo Back Silverline System
BD-Performance Exhaust Manifold
Kennedy Diesel Air box Mod & Resonator plug
6k/8k HID Headlight Upgrade |