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  1. #1
    New Member
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    Jul 2011
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    2
    Tractor
    1941 John Deere Model H

    Default Synthetics in old two cylinders?

    Hello out there. I'm new to this discussion board and just bought my son a 1941 John deere Model H. I want to drain, flush, and refill all the fluids. I was wondering whether or not synthetic oils and lubricants can be used? I know they have a tendency to find fissures and or other small imperfections in gaskets as opposed to conventional lubricants. Anyone with any experiences, whether good or bad please help me out. Thanks in advance.

  2. #2
    Gold Member
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    Nov 2003
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    348
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    Pleasant View, TN
    Tractor
    Mahindra 3325

    Default Re: Synthetics in old two cylinders?

    I personally wouldn't. A John deere A has babbitted bearings. The are not bearings you can replace. You bave to have the pistons rebabbited. Don't know abut a Model H. But with that old of a gtractor i would just use a good detergent oil.

    Don
    Country Life Beats Working.

    Less than 1 month to Retirement

  3. #3
    Bronze Member
    Join Date
    Oct 2012
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    75
    Location
    Windham
    Tractor
    John Deere 70

    Default Re: Synthetics in old two cylinders?

    I thought the same thing with my newly restored 60 but because of the use it would see it would not be worth it.Besides will be changing motor oil every couple of years anyway.The new dino oils are so good today they are very hard to ignore in these vintage machines.

  4. #4
    Veteran Member
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    Apr 2004
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    1,900
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    East Coast of Lake Huron
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    Deere, several

    Default Re: Synthetics in old two cylinders?

    If starting and using the tractor at 0F and colder temps.

  5. #5
    Elite Member MIKE R's Avatar
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    PRINCE TWP, ONTARIO
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    MASSEY 1020, CASE SC, FARMALL F12 and F20

    Default

    A good grade of detergent oil or non detergent depending on factory specs and personal prefference. In my Case I use 30weight non detergent because that is what it has used for the last 67 years and still runs strong.
    "If the women don't find you handsome, they should at least find you handy" - Red Green

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  6. #6
    Bronze Member
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    Oct 2012
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    Location
    Windham
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    John Deere 70

    Default Re: Synthetics in old two cylinders?

    67 years ago wow that must have been about the time the world was converting from whale oil to petroleum.I do agree especially as good as the oils are today.Only been at it a little over 50 yrs just a pup.

  7. #7
    Platinum Member
    Join Date
    Oct 2005
    Posts
    618
    Tractor
    3320 w/cab

    Default Re: Synthetics in old two cylinders?

    Quote Originally Posted by DonWorrell View Post
    I personally wouldn't. A John deere A has babbitted bearings. The are not bearings you can replace. You bave to have the pistons rebabbited. Don't know abut a Model H. But with that old of a gtractor i would just use a good detergent oil.

    Don
    Without any thought, do not replace a nondetergent oil with a detergent, or for that matter a synthetic oil. All you will do is stir up desolved deposits in the oil pan and cause it to get stuck in oil gallies etc.. Unless the engine, etc. has been completely went thru, acid bath, etc, never change the original oil. And especially, as stated above, babbitted bearings are an art, no longer practiced. Trying to find one of these real mechinist, or mechanics is a lost art.

  8. #8
    Epic Contributor Soundguy's Avatar
    Join Date
    Mar 2002
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    Central florida
    Tractor
    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: Synthetics in old two cylinders?

    going from a non detergent oil to a detergent oil is not a big deal.

    if you are worried about a massive amount of sludge breaking loose.. just do it gradually.

    besides. if it took 60 ys to deposit. it's not all coming out on the first oil change anyway.

    I've converted many ND machine over to detergent.

    the dirties one was a jd B

    took about 5 oil changes and 3 filters till she ran clean.


    for synthetics?

    I'd want to go thru and change all seals and gaskets before doing so.

    the benefit? marginal on a machine that sees low hours.. though in cold weather there might be some better lube at startup.

    if I was rebuilding one and planned on using it.. syn sure won't hurt. just did so on a 63 4000 ford.

  9. #9
    Bronze Member
    Join Date
    Oct 2012
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    75
    Location
    Windham
    Tractor
    John Deere 70

    Default Re: Synthetics in old two cylinders?

    Thinking back can remember some old timers talking about flushing motors with kerosene.Back in the 60's a friend bought a can of motor flush at auto parts store poured it in a 400ci Pontiac and drove it 4 miles home,by the time he drove in his driveway it was starting to knock.The can of flush stated "Do Not Drive" only idle for so many minutes.

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