1993 Dodge D350 cummins engine oil pressure gauge drops when you excelerate When you let off the excelerator the oil pressure goes back up Engine runs fine?

Answer 1

first off, has it been doing it ever since you got it...or did it just all of a sudden start happening... if it's a new problem, I'd have the oil pressure checked...also, is it charging ok(gauges)... also, the sending unit may be faulty at high oil pressures... got good oil? I recommend 20w-50 with LUCAS additive for just about any motor, especially a diesel....good luck:)