Cummins isx has low oil pressure

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by trenten02, Jul 31, 2021.

  1. trenten02

    trenten02 Bobtail Member

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    Apr 21, 2011
    monroe,wi
    0
    Have a 2010 prostar has cummins isx..truck runs fine but only has 20 to 25 psi oil pressure going down the road and 5 to 10 when truck is warmed up and idling
     
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  3. Lazer

    Lazer Medium Load Member

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    637
    Jan 22, 2017
    0
    First confirm if the gauge is accurate.
    If accurate, how many miles/hours on the ticker?
    How frequently was the oil & filter changed, 15,000 mi, 25,000 mi, 50,000 mi? It’s possible the motor is just at the brink of worn out.
    If the gauge is accurate, maybe the oil pump could be adjusted?
    If all else fails, switch to straight 30w or 40w motor oil, that will help out as you save for an overhaul.
     
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