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Gear/Differential Oil Spec Comparison (nerdy data stuff)

Discussion in 'Technical Chat' started by TacooSaucee, Apr 14, 2021.

  1. Apr 14, 2021 at 6:26 PM
    #1
    TacooSaucee

    TacooSaucee [OP] Well-Known Member

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    Hello Nerds!

    I am by no means a scientist (literally almost failed university chemistry), but I like data and analyzing things. I've developed this for my own viewing and thought it could be handy for TW to have a quick reference document as well.

    The specifications taken directly from the manufacturer's technical data sheets (links below), it is recommended you read these before choosing an oil, as it may have useful information regarding applications.

    Conditional formatting only highlights the highest (green) and lowest (red) numbers in a row, it does not indicate whether or not it is the best in that category. White cells are in the average.

    If you have suggestions for products you'd like to see, or errors somewhere, please let me know and I can update it.

    upload_2021-4-19_20-24-51.jpg

    Most of these just open a PDF file in a new tab, it will be noted if there is a download or something funky.

    Toyota Geniune (this link downloads a pdf file of the SDS)

    Motul Gear 300

    Motul MotylGear 75W90

    Motul MotylGear 75W85

    Total Transyn

    Liqui Moly Fully Synthetic

    Mobil1 Syn Gear

    Valvoline Synpower

    Redline MT90

    Amsoil Severe Gear

    Royal Purple Max-Gear

    Castrol Syngear

    Motomaster Ex. Pressure 80W-90

    Motomaster Ex. Pressure 75W-90

    Mobile Delvac 1

    Motorcraft XT-M5-QS

    Lucas Oil Heavy Duty SAE


    Small notes: I was bummed at how difficult some of these companies have made it to find technical information on their products, some of them use different standardized tests, some layout the information in a manner that is difficult to read, some use very confusing unit numbers. All and all this may not be 100% accurate as there was some deciphering involved.

    I would like to include more information but space is limited and more in depth information can be difficult to find.
     
    Last edited: May 8, 2021
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  2. Apr 14, 2021 at 6:39 PM
    #2
    Shveet

    Shveet Well-Known Member

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    Holy hell, gotta love data collection. Thanks for compiling this together - this will be an interesting read since i did have difficulty on finding "the best" or something close when i did an early change.
    :thumbsup:
    IIRC Toyota wont sell you Genuine, but that could have been at some point. I personally have Motomaster 80w-90, wonder where that fits in all of this as it's a more readily available oil.
     
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  3. Apr 14, 2021 at 6:42 PM
    #3
    RustyGreen

    RustyGreen If you like to drive -- drive what you like !

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    Nice!
    You could add a GL spec line to your chart.
    Redline makes a 75W-85 GL-5 gear oil which matches the Toyota spec for the axles.
    Motorcraft makes a full synthetic 75W-90 GL-4 gear oil which matches Toyota spec for the manual transmission.
    Thank you for compiling this for us!
     
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  4. Apr 14, 2021 at 7:07 PM
    #4
    TacooSaucee

    TacooSaucee [OP] Well-Known Member

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    Updated for you since I still had my sheet open. I had to use the Safety data sheet, and the stuff listed on the CT website, still missing a 100 degree viscosity and the index. I tried looking at Citgo oils to see if one matched up but no luck on a quick search.

    Thanks for the recommendation! I've added this as well since I already had it listed on my sheet, just had to snip a little farther.

    I do have some of the OEM benchmarks they've passed as well but don't know how to make it clean, I might have to put my data vertically to fit more products/information. I will work on it. :thumbsup:
     
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  5. Apr 14, 2021 at 7:31 PM
    #5
    RustyGreen

    RustyGreen If you like to drive -- drive what you like !

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  6. Apr 14, 2021 at 7:34 PM
    #6
    FastEddy59

    FastEddy59 TTC #0061

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    Great info & Spec’s right there. Passes the Smell Test for me. :thumbsup:
     
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  7. Apr 14, 2021 at 7:36 PM
    #7
    Shveet

    Shveet Well-Known Member

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    oh boy that's fascinating to see how much of a jump the viscosity is like once it's start to warm up. Where, been a while since i looked at kinematics of fluids, but the 139 refers to a much thicker and slower moving oil as it's worked up. and as you said, the higher number highlighted in "green" doesn't mean "the best" in the category as this one is, but the Motul 300 "technically" is the best as flows a lot more easily meaning less resistance within the gearing.

    With resistances, it would indicate burning more fuel... this would explain a few things o_O
    i guess gear oil change sometime after the Ardbeg trip then
     
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  8. Apr 14, 2021 at 7:40 PM
    #8
    Shveet

    Shveet Well-Known Member

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    oh don't remind me... back in shop class in Highschool... rear diff oil change with 150k on it... the smell... oh god the smell.... why do i still remember it...
    :puke:
     
  9. Apr 14, 2021 at 7:45 PM
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    FastEddy59

    FastEddy59 TTC #0061

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    I’m a former Oilpatch guy. All smells like Money to me. :)
     
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  10. Apr 14, 2021 at 7:46 PM
    #10
    RustyGreen

    RustyGreen If you like to drive -- drive what you like !

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    Changing the clutch in an old 3 speed Chevy truck, managed to dump 20 year old gear oil in my hair -- my kind of Beatles style hair... :facepalm:
     
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  11. Apr 14, 2021 at 8:22 PM
    #11
    Triple P

    Triple P Well-Known Member

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  12. Apr 19, 2021 at 5:27 PM
    #12
    TacooSaucee

    TacooSaucee [OP] Well-Known Member

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    Added a few oils; Motorcraft XT-M5-QS, Motomaster Extreme Pressure 75W-90, Mobil Delvac 1, Lucas Oil HD SAE.

    Update to layout and better conditional formatting to show those near the top/bottom.

    Hyperlinks!

    Sorry I forgot to respond to this; some decent information but it seems to be pretty opinion based, he kind of lost me at recommending conventional oils for cost savings.
     
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  13. Apr 19, 2021 at 8:54 PM
    #13
    Triple P

    Triple P Well-Known Member

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    I agree. I had an email from them with more testing and details, but couldn't find it. I'm still researching/ procrastinating. Thanks for new info
     
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