Family member just picked up a 38k 2013 FJ Cruiser TT 4x4 with the automatic. I've heard a lot of discord on their forums about 75w-90, 80w-90, 75w-140, etc. The truck will be mostly used for on-road 40/60 hwy/suburban driving. I'm wondering what the word is here. I plan on using Valvoline Syn 75w-90 in the f/r diffs and t-case....just due to the fact I can get a good deal on it after coupons.
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