I was going threw the Quick Silver catalog and noticed they have a extreme performance gear lube-SAE 85 W 90. It list for aprox $3 more per quart. description says designed for outboard and sterndrive racing applications. I have always used the high performance gear lube SAE-90. Is anyone using this?

Its full synthetic and I use it in my XR, and use HP in standard Bravo. Have only used it one season so far