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Oil Pressure Dropping at Idle, Engine Warm, 5w-30

Discussion in 'Non-Turbo Tech questions' started by GLXRustang, Jul 6, 2012.

  1. GLXRustang

    Joined:
    May 6, 2012
    Hello All,
    Here's my problem, when the engine is cool, oil pressure stays high at idle and throughout rpm range, when the engine gets warm the oil pressure drops at idle. Drops down to the O in N O R M A L, at idle, off idle pressure goes up to A. Sorry don't know exact PSI..

    My questions:
    Do you run an Oil Cooler? (What size?)
    What oil are you running? (Weight? Brand? Synthetic?)

    Running a turbocharged 306 SBF, DIY blow-thru, freshly rebuilt with bearings, rings, pistons, rods, and high volume oil pump. Running Castrol GTX 5W-30 and no oil cooler..
     
    GLXRustang, Jul 6, 2012
    #1

  2. Briansshop

    Joined:
    Dec 12, 2006
    It's going to be low with 5w oil. I'm using Mobil 1 15w 50 and oil press is too high, will be switching to something else. No oil cooler on mine.
     
    Briansshop, Jul 6, 2012
    #2

  3. stangman9897

    Joined:
    Mar 23, 2009
    That is normal , when it's cool the oil is thicker and as the oil heats up it thins out and your pressure will go down. My 97 D/D cold at idle is 65 but after it's up to temp it stays at 38 at 900rpm with Mobil 1 5/30 this is a modular. If thats a pushrod i would run 10/30 or 15/40 . JMO
     
    stangman9897, Jul 6, 2012
    #3

  4. GLXRustang

    Joined:
    May 6, 2012
    Thanks, looks my choice of 5w-30 is off then. Thinking about switching to Castrol GTX 20w-50 since I only drive in Summer/Spring and temps now are in the 100's.

    I'm going to try an oil cooler as well, my turbo is not water cooled, it only relies on engine oil to keep cool

    Just wondering what other turbo guys are doing for oil..
     
    GLXRustang, Jul 7, 2012
    #4

  5. Turbohwagon

    Joined:
    Dec 6, 2005
    15-40 rotella, and stop using that dumby gauge, it's dumb. Toss a mechanical gauge on the car so you know have some solid numbers to go off of instead of letters.
     
    Turbohwagon, Jul 7, 2012
    #5
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