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.