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what gear oil do you guys use?

Discussion in 'SVT Shelby GT500' started by [email protected], Sep 5, 2017.

  1. Steve@TF

    [email protected] Authorized Vendor Authorized Vendor

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    i need to replace my diff cover so i guess ill be replacing the fluids as well. what do you guys run? any real difference?

    i see Royal Purple has friction modifier already in it. but $20 a qt and need 3 qts.

    Mobil 1 is about $12 a qt. it doesnt say if it has FM in it already..
     
  2. Fast Ford

    Fast Ford Active Member Established Member

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    Royal Purple Max-Gear 75w-140. No issues at all with lots of launches on the 1/4 and 1/2 mile.
     
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  3. Steve@TF

    [email protected] Authorized Vendor Authorized Vendor

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    did you add friction modifier to it?
     
  4. RBB

    RBB Well-Known Member Established Member

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    I'm running the same, with the same type of use. I've tried it with and without the modifier added and noticed absolutely no difference, so I'd say save your money since it's already in the fluid.
     
  5. lexustech48

    lexustech48 RIP FoMoCo 1903-2014 Premium Member Established Member

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    Im running Amsoil Severe gear 75w-140 and i love it. No friction modifier added.
     
  6. Fast Ford

    Fast Ford Active Member Established Member

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  7. Adam@ACMPerformance

    [email protected] New Member

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    Torco SGO 75w-140 with Type F modifier over here
     
  8. Imatk

    Imatk Well-Known Member Established Member

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    I did the motorcraft.
     
  9. fletchffletch

    fletchffletch Member Established Member

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    I did


    Sent from my iPhone using Tapatalk
     
  10. barspen

    barspen Active Member Established Member

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    RP 75W-140 + Ford Friction Modifier. For an extra $5, just put the additive in.

    But be warned, FM smells like the worst thing ever and it will make your hands, garage, rags, etc stink like you've never smelled before. :)
     
  11. einehund

    einehund Well-Known Member Established Member

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    Same oil here but I went ahead and added the Ford friction modifier.
     
  12. Steve@TF

    [email protected] Authorized Vendor Authorized Vendor

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    i ended up grabbing the RP 75-140 with FR friction modifier. LMR has some good deals on kits.
     
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  13. fletchffletch

    fletchffletch Member Established Member

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    Ditto on LMR -- exact route I took when I did mine.
     
  14. mikes35

    mikes35 Active Member Established Member

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    Don't forget the Lube Locker gasket. I just changed mine with the RP 75-140 and added friction modifier. Seemed to quiet my 180,000 mile rear end down a little. Used the lube locker gasket, no leaks and will be easy to remove in the future.
     
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  15. fletchffletch

    fletchffletch Member Established Member

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    Ditto on the Lube Locker gasket!
     
  16. Steve@TF

    [email protected] Authorized Vendor Authorized Vendor

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    yep, got the rear end kit that comes with it. basically free FM at that price. then added a 3rd qt to the order.
     
  17. RBB

    RBB Well-Known Member Established Member

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    I like the Lube Locker as well, but watch out if you try to reuse one. Many will say that it's ok to do so, but I had a small leak the last time I tried to do that. Maybe it was just bad luck, but I won't make that mistake again.
     
  18. Imatk

    Imatk Well-Known Member Established Member

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    I got the lube locker but it leaked on me.

    RTV for me from now on.
     
  19. RBB

    RBB Well-Known Member Established Member

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    I've never had a new one leak, but that used one had fluid weeping out from around the cover. It wasn't really even enough to drip on the garage floor, but every time I'd wipe the bottom of the housing off and go for a drive it would be wet again.

    Just a heads up....I've seen a lot of guys online saying it's perfectly ok to re-use those things.
     
  20. Imatk

    Imatk Well-Known Member Established Member

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    That's exactly what mine did.

    It never accumulated enough to drip on my test drives... but it was always wet at the bottom.
     

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