Barry...just saw the edit you added after I responded regarding what OEM mfgs are using, evidently for their hydraulic applications...interesting. That answers that.
Anthony, I don't recall if was an advertiser here before. I agree re the
oil...I've always used VR-1 Racing
oil per my builder's recommendation for that reason.
Chappy...cool! So (since the question has been begged) how long does an OEM gear last?
