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I need help! I accidentally put 1 gallon of vacuum pump oil into my engine. Will it hurt anything.

Discussion in 'Freightliner Forum' started by 96Freight, May 8, 2018.

  1. May 8, 2018 #1
    96Freight

    96Freight Bobtail Member

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    May 8, 2018
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    I use to haul water with my truck so I had a challenger vacuum pump on it. I recently took pump off and started hauling belly dumps. Well my truck was short about a gallon of oil so I went into my shop and grabbed a gallon of oil thinking it was 15w 40 oil. After I poured it in I turned truck on and after awhile I noticed my oil pressure psi was at 60 to 70 when it regularly runs around 50. I hope I didn't but I'm thinking I put my vacuum pump oil in the engine. If I did will it hurt engine or anything else.
     
    96Freight, May 8, 2018
    96Freight, May 8, 2018
    #1
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  3. May 8, 2018 #2
    magoo68

    magoo68 Road Train Member

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    st malo mb canada
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    If it’s gear oil it is pretty much the same as adding a gallon of Lucas .. I suspect pressure comes down a bit when it’s up to full temp .. I’ve added a gallon of gear oil to older engines with low oil pressure to bring it up a bit
     
    magoo68, May 8, 2018
    magoo68, May 8, 2018
    #2
  4. May 9, 2018 #3
    uncleal13

    uncleal13 Road Train Member

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    Humboldt, Sk
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    Similar to oil used in air compressors. Non-detergent. Won’t hurt anything. A single gallon won’t make much of a difference.
    If this is a newer truck, the emissions system may not like it. But won’t be catastrophic.
     
    uncleal13, May 9, 2018
    uncleal13, May 9, 2018
    #3
    magoo68 Thanks this.
  5. May 9, 2018 #4
    brysol01

    brysol01 Medium Load Member

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    I had good luck adding gear oil to ISX to dry up a leaking rear main seal there is a certain grade that is less abrasive think it is GL4, Amazon has it by the gallon, that was one truck ago hard to remember all that
     
    Last edited: May 9, 2018
    brysol01, May 9, 2018
    brysol01, May 9, 2018
    #4
  7. May 9, 2018 #5
    Oldironfan

    Oldironfan Road Train Member

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    Gear oil is light years better than Lucas. Gear oil is made for high pressure, and has additives. It's cheaper I think to.
     
    Oldironfan, May 9, 2018
    Oldironfan, May 9, 2018
    #5
    brysol01 Thanks this.
  8. Apr 14, 2019 #6
    starmac

    starmac Road Train Member

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    Fairbanks Ak
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    I have used lucas for 40 years, unless none was available at oil change time. I have never noticed it changing my oil pressure.

    Just curious old iron, what did lucas ever do to you, you must have had a bad experience with it?
     
    starmac, Apr 14, 2019
    starmac, Apr 14, 2019
    #6
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