I've got a 2007 Subaru Outback with a manual trans which calls for a GL-5 gear oil in the transmission. Am I correct in thinking an oil without a friction modifier would be best? I know Redline sells (and recommends for my car) a synthetic gear oil without the modifier. Being cheap, I'm looking to use a conventional oil. I called the Valvoline tech support line and the guy I spoke with said they add "some" friction modifier/limited slip additive to all their gear oils. Are there any good quality conventional gear oils that don't have it? I'm looking to use a 75W/90 or a 80W/90.
Thanks in advance!
-Jim
Thanks in advance!
-Jim