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2004 Maserati 4200 coupe - Oil weights

Discussion in 'Maserati' started by BrandonE, Jul 7, 2023.

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  1. BrandonE

    BrandonE Rookie

    May 22, 2019
    10
    San Antonio, TX
    Full Name:
    Brandon Edwards
    #1 BrandonE, Jul 7, 2023
    I had a customer with a 2004 Maserati 4200 coupe that had taken his car to another local shop where they changed his oil with Motul 15w50 300v competition race oil and a cheap off brand filter. He took it back to them because the engine was making noise and the oil pressure was dropping at idle. They blamed it on the cheap filter and installed an OEM filter. From what I understand the issue mostly went away but he could still hear some lifter noise every once in a while.

    Now a few months later he brought his car to me for an oil change and I put an OEM Maserati filter on it and went with the recommended oil 5w40. Once the car heats up the oil pressure drops to about 8 PSI and the oil light comes on. I know what I am thinking but I would like to get another opinion.
     
  2. Ferraripilot

    Ferraripilot F1 World Champ
    Owner Project Master

    May 10, 2006
    17,755
    Atlanta
    Full Name:
    John!
    #2 Ferraripilot, Jul 8, 2023
    Certainly not great news. That 15/50 oil change with questionable filter may have smoked the bearings resulting in greater tolerances such that the 5/40 can no longer make adequate pressure. Either continue to use a 15/50 or 5/50, or tear into the engine. Might be worth checking pressure with a mechanical gauge as well to be certain
     
  3. tstuli

    tstuli Formula Junior

    Jun 12, 2018
    379
    NC
    #3 tstuli, Jul 8, 2023
    Just a few less scary possibilities…

    If you’re sure the engine was refilled properly, How are you measuring the 8psi? If it’s with the dash gauge you may want to confirm first with a external gauge connected. The built in sender is notorious for failing / being inaccurate.

    Also making sure you’re using the right filter for the dry sump. The wet sump version looks almost identical (different part number).
     
  4. JulianMerak

    JulianMerak Formula 3

    Dec 8, 2010
    1,104
    Melbourne, Australia
    #4 JulianMerak, Jan 22, 2024
    Two Maserati/ Ferrari specialists here in Melbourne Australia both recommend using 10w60 penrite racing oil. Formula Dynamics also sell their 10w60 oil for 4200's.
    I also tried to ensure that the lower air intake is not blocked by the number plate, by adding two 5mm spacers and angling the plate backwards slightly to allow more air to flow under the bottom edge. This should keep the engine a bit cooler in extremely hot conditions
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  5. 67bmer

    67bmer F1 Rookie
    Silver Subscribed

    Oct 28, 2015
    2,701
    MD
    #5 67bmer, Jan 23, 2024
    racing oil is only for race cars!!

    Use a name brand oil from Walmart with the correct viscosity for the car!

    Then I would check the actual oil pressure with a gage.
     
  6. JulianMerak

    JulianMerak Formula 3

    Dec 8, 2010
    1,104
    Melbourne, Australia
    #6 JulianMerak, Jan 23, 2024

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  7. JulianMerak

    JulianMerak Formula 3

    Dec 8, 2010
    1,104
    Melbourne, Australia
    #7 JulianMerak, Jan 23, 2024
    I wouldn’t suggest this grade for all climates but for city driving in 110 degree Australia it’s not a bad option and it seems to keep the oil pressure heathy at tickover in traffic
     
    red27 likes this.

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