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Thread: Did a oil change . Mixed 2 10w-30s together and used new filter

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    Did a oil change . Mixed 2 10w-30s together and used new filter HIGH PRESSURE

    Hey guys so I did a oil change last night .
    I have usually used fram or a regular Mobil 1 filter and Pennzoil 10w-30

    I went and got a Mobil 1 high mileage filter that says it's food for like 20k or something so I thought it give it a whirl. I got a 5L jug of Pennzoil 10w-30 thinking I had a extra at home but I didn't .
    I noticed I had a jug of 10w-30 from a Mobil 1 newer vehicle formula jug . So I took .9L out of that and used it as well .

    My probl3m right now is since I did the change the pressure gauge doesn't stay at the centre unless I'm dead stop idle and if I'm driving 50km or 110km the gauge is half way between centre and the next line and it has a weird hooning sound I've never hear before now . I can't describe it but let's just say it's no loud but it's only there under acceleration .

    Now my jeep every time I do a oil change . I put in minimum 5.7 max 5.9 because every time I change it I only get like 4.8-5L drained out of it . Idk if its burning oil or whatever but I know I don't have a gasket on my opda and I loose a little it there but I doubt almost whole litre .

    PLEASE HELP IN DRIVING 7 HOURS straight next Friday with my gf and I can't have high pressure issues!! Going 110km whole way
    Last edited by LJ newb; 09-15-2017 at 11:00 AM.

  2. #2
    Stickybongsmoking's Avatar
    Stickybongsmoking is offline Yes, this is gawd damn muthafockling CTD NUT.
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    - Mixing two similar oils isn't really the end of the world.

    - Slightly elevated oil pressure isn't the end of the world, either. The factory gauge is woefully inaccurate so take that reading with a grain of salt.

    - Regular Fram oil filters are shit. A very poor quality filter. Mobil1 filters are rebadged from another manufacturer which alludes me right now.

    - Do not overfill your engine oil. Fill it to the top of the dipstick mark and that is it. Failure to do so has the potential to cause all sorts of issues. Overfill it enough and you will have excessive windage caused by the crank smacking the oil. This can lead to excessive crank pressure which can lead to poor ring sealing, lost efficiency, seal leaks, etc. It is a good habit to check oil routinely between changes. If the engine burns oil between service intervals, top it up as needed. Never overfill to compensate.
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    I'll just add to Stickey's post. If your oil pressure sending unit and gauge are working correctly 1/4 to half would be normal oil pressure on a 4.0L at idle. 1/2 to 3/4 would be normal while driving.
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    Ok I won't top past 5.7 again thanks for that info helps a lot not to worry . I just wasn't used to swing it move that much maybe the extra .2 is causing slight pressure issues I'll drain .2 L tonight when I get home so it's at 5.7

    Thanks sticky and rb jeep

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    What they said. (dont over fill)
    Also your oil pressure will change with rpm's.
    As well as temp. from less to more with a hot to cold motor.

    If you have a true oil gauge the pressure should change up and down the same as your rpm's change. Ie.. If you rpm's go up 1 point of measurement then your oil pressure will go up close to 1 point of measurement.

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