You should be able to uprate your engine, but you will have to pay for it, price should be $1000 to go from your standard rating to a performance...
Year/make/model of engine?? And what kind of truck would be helpful
DD15, usually gets .2 mpg better then isx, just make sure if its used, check and see if its been repaired for and oil leaks and got any of the...
its getting harder and harder to find good technicians every day, find a good one, and stick with him!
all are somewhat "common" failures but shouldn't be repeated failures of the same parts unless many miles are on them, also make sure the wiring...
keep the 60!!!
also take it to a Freightliner/Detroit dealer and have the DDEC Reports printed off (all of them) and reset
send in a sample for coolant analysis
