Bill, I sent them to you. I will try again.

Ken

An Amsoil rep told me to use Amsoil Severe Gear 75-90 in Bravo Outdrives. Better additive package....it's what some racing teams use.

Ken,

My appologies. I discovered that your mail was being routed to my spam folder. I corrected this problem. Please resend.

Thanks,

Bill

How does this gear lube compare to the Redline Shock Proof gear lube?

Bill/Ken,
I understand you don't want post the analysis. Can you comment on the Merc oil vs others by stack ranking your top 5 oil preferences for a HP marine application?
Ben

I'll let Ken or other respond. I am just a layman boat owner trying to learn.

I called Amsoil and spoke to one of the people in the technical department and they said the opposite. They said they designed that fluid with the cone clutch found in the bravo's in mind. I could see possibly running the severe gear if you are making power above what a 525 would produce. One thing I woud be concerned about if I was running a 525 and lower in regards to using the sever gear is burning out the cone clutch. I am also a boating lover trying to learn, and trying to sell a little Amsoil while doing it.

So Amsoil designed the severe gear lube to work best in the bravo drive with what hp? What gear lube does Amsoil recommend for bravo drives that are below that hp? What could cause the cone clutch in the bravo drive to burn up if the Amsoil severe gear lube was used with hp below that recommended?

This is my understanding:
The severe gear product was designed for the differentials in our trucks, not with the marine drives in mind.

I'm honestly not sure what it is in the fluids that would cause or keep the cone clutch from burning up. I've heard from a "Premeir Certified Merc Mechanic" that he has seen cone clutches wear out pre-maturley from synthetics.

The Marine gear lube was designed for all B1 drive's, (X, XZ, XR, etc...) I had somebody on here ask me about what fluid to use in the SSM drives and the Amsoil tech also said the 75-90. I BELIEVE if you pull a owners manual on a XR drive, it will tell you to run a 75/90 GL-5 fluid (I may be wrong). There are also people on here that say that Teague "recommends" the severe gear 75/110. Teague is obviously a very smart guy and has a much better understanding of all of this stuff then we ever will.

I am not a chemist and at this point don't have all the facts. I am like many of you on here that are enthusiasts that are trying to learn more about the fluids.

Hybrid synthetics/Dino oil may help the longevity of the cone clutches but full synthetics may protect the gears better. I would rather rebuild a cone clutch that have gears implode.

I just had a Shelby rear end customized by a shop that specializes in drag race 9 inch rear ends and his warranty is voided if you don't use Torco GL5 mineral oil.
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