Alright, I do my best to so my own maintenance for my 2017 Toyota Tundra but life has really kicked me in the teeth this year, and I chose to let the Toyota dealership change out the rear and front differential oil. The owners manual states to use LT 75W-85 GL-5 or equivalent. I get the receipt and it shows 90w was used, and I quickly pointed it out to their service advisor who went back to the shop to confirm what was used. He and a mechanic returned and confirmed that bulk 90w was used, and I was basically told that the differentials in my truck are allowed to have a little leeway in viscosity such as 90w while others must use the 75w-85. The mechanic reassured me that my Tundra would be fine.
I was a little skeptical, so I stopped by a different Toyota Dealership to run the scenario by them. They made a phone call to the parts department to inquire about what gear oil they use, and he stated they use 80w-90. Looks like they don't even want to use Toyota's very expensive 75w-85.
Are there any cons to the 90w they used? I assume MPG could suffer, but it's a Tundra and I've never expected much out of fuel mileage. I live in blazing hot Texas so I assume the thicker viscosity shouldn't pose too much of a difference. Anyway, this was more of a FYI and vent post, but any advice is appreciated.
I was a little skeptical, so I stopped by a different Toyota Dealership to run the scenario by them. They made a phone call to the parts department to inquire about what gear oil they use, and he stated they use 80w-90. Looks like they don't even want to use Toyota's very expensive 75w-85.
Are there any cons to the 90w they used? I assume MPG could suffer, but it's a Tundra and I've never expected much out of fuel mileage. I live in blazing hot Texas so I assume the thicker viscosity shouldn't pose too much of a difference. Anyway, this was more of a FYI and vent post, but any advice is appreciated.
