mals
Full Access Member
Honestly, I'm not sure why my mileage is as good as it is. My dad's tahoe is 4 years older with an efan mod, mostly the same everything else (both 5.3) mines a z71 and his is an LT, and on the same roads he gets 12-13
So, I dunno. Good luck I guess.
Not to rain on your parade, but have you manually calculated your MPG with miles on the odometer vs. gallons at the pump to full? The only reason I ask is because the gallons used counter on my DIC does not match the amount of fuel it takes to refill the tank. The DIC is using that number to calculate the MPG on the display. My true MPG is always lower then the tank MPG on the DIC.
I'd be happy, but surprised, to be wrong.