Originally Posted by MasterKwan
You guys that think you know better than Subaru... You really amuse me. Don't you think Subaru would love to run cheap assed transmission fluid in their trannies and NOT have to both source and stock Extra-S which is ONLY used in the 6 speeds if there wasn't a reason for it?
I believe Extra-S was a response to premature Synchro wear problems in the 6MT's.
I somewhat buy this, but if it's really that important you'd think Subaru would make it more readily available and at least educate dealership parts/service departments of it's existence. As an example Subaru LSD oil with part # is listed in the service manual. Nowhere does Subaru make mention of using their transmission fluid, not even a recommendation.