Originally Posted By: Bandito440
I have some conventional Valvoline 75w-90 in my stash. It's not marked LS, and I bought it in 2012. The Forester has it in the manual transaxle and rear diff. No problems in 18,000 miles!
That is what I've been using on my Corolla; it's been the best fluid I've used. Synthetic 75w-90, even GL-4s have been notchy. I'm apprehensive about using Valvoline anymore since it now contains limited slip friction modifier!