I have a 2022 4Runner and I’m trying to choose between Amsoil Severe Gear and Mobil Delvac for the front and rear differentials. On one hand I want to use a premium diff fluid since I plan to keep this vehicle for as long as possible but on the other hand I like the idea that I can get a gallon jug of Mobil Delvac 75W90 for $40. I can change out the front and rear differential fluid with Mobil Delvac twice for the same cost as one change with Amsoil Severe Gear. I also like how Mobil Delvac doesn’t have LS additive since I have open differentials although I’m not sure how much that really matters.
What would you choose between these two options? I’ve always heard good things about Amsoil but how does Mobil Delvac compare to it? With my 4Runner being an off-road oriented vehicle, I’m thinking I might be better off with a cheaper diff fluid that can be changed more frequently in case I’m going through deep water and want to make sure I didn’t get any water intrusion into the axle.
What would you choose between these two options? I’ve always heard good things about Amsoil but how does Mobil Delvac compare to it? With my 4Runner being an off-road oriented vehicle, I’m thinking I might be better off with a cheaper diff fluid that can be changed more frequently in case I’m going through deep water and want to make sure I didn’t get any water intrusion into the axle.