• Welcome to EcoDieselRam.com We see you haven't REGISTERED yet.

    Your truck knowledge is missing!
    • Registration is FREE , all we need is your birthday and email. (We don't share ANY data with ANYONE)
    • We have tons of knowledge here for your EcoDiesel truck!
    • Post your own topics and reply to existing threads to help others out!
    • We believe in quality OVER quantity, and a family friendly place for your #EcoDiesel home!
    CLICK HERE TO REGISTER! Problems registering? Click here to contact us!

    Already registered, but need a PASSWORD RESET? CLICK HERE TO RESET YOUR PASSWORD!

DEF MPG

Aug 28, 2016
47
20
Truck Year
2015
2015 RAM 1500 Ecodiesel Bighorn with 17'' Rims and 10ply tires. This is my second fillup with DEF (at the pump) and first fillup of DEF with the entire mileage on the GDE Hottune.

First fillup I went 8166 Miles on 5.91 Gal of DEF for a MPG of 1381.

2nd fillup was 8221 miles later and required 5.83 Gal of DEF for 1424 MPG. The GDE hottune was installed 2000 miles before the first fillup. So not too bad. My oil sure is staying cleaner with the GDE.
 

John

Well-Known Member
Nov 13, 2015
1,186
380
DEF consumption sounds about right in line with GDE's claim:

"DEF tank refill interval always aligned with the oil change interval."
 
Top