Walmart SuperTech 75/140?
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Cruiser
Joined: Jul 2010
Posts: 235
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From: Yuma, AZ
Walmart SuperTech 75/140?
I want to run 75/140 in my SG tranny this summer. I have always had Mobil 1 in all three holes. But nobody has the Mobil 75/140 here . I've been told the Walmart SuperTech is basically same stuff. Does anyone know if the synthetic superTech stuff is any good. I can get it in both stores here and it's a good bit cheaper than Mobil 1 anyway. Thanks
Last edited by Splais1; Jul 3, 2012 at 10:52 PM.
Road Warrior
Joined: Jun 2009
Posts: 1,943
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From: NYC
this would be a no-go. SuperTech 75W140 is a GL-5 rated gear oil. You can only use GL-4 rated gear oil in your tranny. GL-5 is corrosive to soft metals . GL-4 is fine with soft metals. Mobil 1 GB oil is also a GL-5 rated oil.
I was under the understanding that H-D 6 speeds did not have any soft materials in it? If that's the case, a lot of Redline ShockProof users are doing harm to their trannies as it's a GL5+ rating ...
Last edited by troop; Jul 4, 2012 at 08:48 AM.
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Seasoned HDF Member
Joined: Apr 2006
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From: Billings,Mt.
Can you provide proof that GL5 will harm the transmission?
Take a look at the oil forum.Many of us here are using GL5 rated lubes such as Amsoil,Mobil,etc-.
Last edited by 1flhtk4me; Jul 4, 2012 at 09:16 AM.
Seasoned HDF Member
Joined: Mar 2009
Posts: 24,712
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From: Snow Hill, NC
I have Walmart 75w140 for the last 3 changes... no issues... i have not seen any difference between, Formula plus, amsoil 20w50, movil 1 20w50 v twin or Walmart 75w140...70000 miles on my 07... it's full syn just like Mobil 1 so i went ahead. By the way... when the dealer changed my inner primary bearing at aroud 45000 the tranny looked impecably clean... mechanic said the saome...