looking at a 89 Freightliner with I believe a 855 in it (when did the N-14's start?). Anyhow it smokes a little on start-up but clears quickly and runs strong and is only supposed to have 200,000 on it. How ever, it only holds 30PSI oil pressure at 1700 rpm when hot. Is the motor shot or do these motors run a little lower on oil pressure.
Cummins 855 oil pressure?
