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Eneos 75w-90 Gear Oil #5410921 04/23/20 07:09 AM
Joined: Apr 2009
Posts: 508
klt1986 Offline OP
OP Offline
Joined: Apr 2009
Posts: 508
Anyone used or know much about Eneos 75w-90 Gear Oil? Getting ready to change the rear diff fluid in my 2011 Tundra. I was looking online at the local NAPA for an air filter and searched their selection of gear oils. It was the only gear oil that came up as a "direct fit" for the differentials and t-case on the Tundra. Surprisingly it was priced the same as M1 and Valvoline SynPower. In addition there was 20% off if you bought 3 or more items.

Re: Eneos 75w-90 Gear Oil [Re: klt1986] #5410966 04/23/20 08:15 AM
Joined: Jul 2007
Posts: 5,302
LoneRanger Offline
Joined: Jul 2007
Posts: 5,302
I used it in my 2009 Subaru Forester. Main reason was the unique situation with the Subaru manual transmission: Hypoid front differential located internally in the manual transmission sharing gear oil with it. Yellow metals in the transmission's synchro's do better with a GL4 but hypoid diff needs GL5. Could not use any gear oil with friction modifiers in it due to the synchro's. The formulation of the Eneos 75W-90 at the time was a decent compromise for the situation. I have only anecdotal info about it's performance however since I traded the car in before doing the next scheduled gear oil change on trans and rear diff (had it in rear diff too). I do know that it's not synthetic, or at least it wasn't at the time. I had emailed a company tech rep and their reply said it was not synthetic and that the performance criteria were accomplished with a conventional base oil. But that was in about 2011, so formulation could have changed since.

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