Between Omaha and Des Moines, 7 miles South of I80 | Yes, quite a few drivers complained, they lost .3 to .5 MPG, after a Low Nox software, was installed.
We had to do it, on any overhaul for CAT warranty, in my last years, working at a Dealership.
Remember, those BIG fines, from the government, to CAT, Cummins, and Mack engines, years ago. Well, this Low Nox software, was part of the agreement, to go backwards and get those older engines, back into compliance.
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