Quote:
Originally Posted by Gordon J
When I owned a trucking company I hired a trucking maintenance/management firm. The company tracked data on all new freight liner trucks, to include fuel economy. It had fleet level data on tens of thousands of trucks. In order of most efficient was Cummins, then Cat and only a bit worse Detroit’s.
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Sounds like you're referring to 2-stroke Detroits if they were in Freightliners. The OA440 used a compact 4-stroke found in school buses, small dump trucks, and industrial applications. Different animal that's in it's element in a constant rpm application like a boat or pump.