Paccar MX-13 tuning

[Moose]

Just please do some due-diligence research on the programmer you choose, Talk to them about what they do, ask for references, CALL this references. Ask them how long has it been tuned, how do their oil samples look since, how has their fuel mileage improved or decreased. If they don't sample or know mileage figures then I don't give their reference much merit. I've run across decent deals on both the MX powered trucks and DD15. I will stay away until I get some hard data from reputable references.

If I wouldn't have found who I did and have them help me on this ISX, I can guarantee I would have pulled it apart already if it hadn't done it for itself by now.