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    Quick Links: Just Installed a Powertrax No Slip AKA Lunchbox Locker in my 2nd gen Mix 'high mileage Mobil 1' with regular mobil 1, both fully synthetic Rooftop tent modified install Gear/Differential Oil Spec Comparison (nerdy data stuff) Adding horns, can I install a beefier stock relay? Bad Battery? Tested for Parasitic Draw, Different Battery...

For those who re geared (aftermarket gears)- What Gear Oil Weight?

Discussion in 'Technical Chat' started by KaptainH, Dec 10, 2018.

?

What Gear Oil Weight, And Synthetic or Dino?

  1. Synthetic 75w-90

    1 vote(s)
    4.2%

  2. Synthetic 75w-140

    5 vote(s)
    20.8%

  3. Dino 85w-140

    18 vote(s)
    75.0%
  1. Dec 10, 2018 at 6:05 PM
    #1
    KaptainH

    #1
    KaptainH [OP] Well-Known Member

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    So just finished breaking in my new gears and going to regear- The shop put in 75w-140 but I was thinking about going back to thinner stuff. However the G2 site and ECGS sites recommend the heavier stuff and non-synthetic. What y'all running?
     
    KaptainH, Dec 10, 2018
    #1
  2. Dec 10, 2018 at 6:06 PM
    #2
    Clearwater Bill

    #2
    Clearwater Bill Never answer an anonymous letter

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    Does the gearset have a warranty? And thus a lube requirement?
     
    Clearwater Bill, Dec 10, 2018
    #2
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  3. Dec 10, 2018 at 6:12 PM
    #3
    KaptainH

    #3
    KaptainH [OP] Well-Known Member

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    Yes, no
     
    KaptainH, Dec 10, 2018
    #3
  4. Dec 11, 2018 at 7:25 AM
    #4
    Scott B.

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    Scott B. Well-Known Member

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    My understanding is in our use, synthetic does not provide any real advantages.

    I change mine every 15K - 20K miles anyway - really no benefit for synthetic at that short of a change cycle. Much more beneficial to remove the dirt/water/contaminates.
     
    Scott B., Dec 11, 2018
    #4
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  5. Dec 11, 2018 at 7:29 AM
    #5
    Tyler07

    #5
    Tyler07 Well-Known Member

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    Tyler07, Dec 11, 2018
    #5
  6. Dec 11, 2018 at 7:32 AM
    #6
    zero4

    #6
    zero4 Metal Cutter

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    zero4, Dec 11, 2018
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  7. Dec 11, 2018 at 8:35 AM
    #7
    KaptainH

    #7
    KaptainH [OP] Well-Known Member

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    Yeah I ended up going with the 85w140 Lucas.. what about for your transfer case? Do you still use the Mobil 1 75w90?
     
    KaptainH, Dec 11, 2018
    #7
  8. Dec 11, 2018 at 8:37 AM
    #8
    zero4

    #8
    zero4 Metal Cutter

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    What's that? .......I don't have one on this truck. :rofl: :(
     
    Last edited: Dec 11, 2018
    zero4, Dec 11, 2018
    #8
  9. Dec 11, 2018 at 8:52 AM
    #9
    Scott B.

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    I should have stated that I use Lucas brand gear oil.

    In the t-case, I just switched to Lucas synthetic. I debated between dino and synthetic - not sure it makes much difference here, either.

    I do think Lucas gear oil is better than many/most of the dino oils on the market.
     
    Scott B., Dec 11, 2018
    #9
  10. Dec 11, 2018 at 8:52 AM
    #10
    KaptainH

    #10
    KaptainH [OP] Well-Known Member

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    But you do use the 75w90 in the TCase?
     
    KaptainH, Dec 11, 2018
    #10
  11. Dec 11, 2018 at 8:53 AM
    #11
    inesshell

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    inesshell blah blah blah

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    140 in diffs and 90 in t case
     
    inesshell, Dec 11, 2018
    #11
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  12. Dec 11, 2018 at 8:56 AM
    #12
    Scott B.

    #12
    Scott B. Well-Known Member

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    Yes.
     
    Scott B., Dec 11, 2018
    #12
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  13. Dec 11, 2018 at 1:08 PM
    #13
    la0d0g

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    la0d0g Its 4 o’clock somewhere

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    Lucas as ECGS recommends.
     
    la0d0g, Dec 11, 2018
    #13
    KaptainH[OP] likes this.

Products Discussed in

Mobil 1 104361 75W-90 Synthetic Gear Lube - 1 Quart (Pack of 2)
$28.00
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