Originally Posted by Hydrocruiser

FYI...Amsoil is now saying to use Amsoil "exterme gear lube" in high output offshore boat drives and change it of couse more frequently as it does not have the ability to handle much water very well... the Amsoil Marine Gear Lube is not for high HP/Torque output/" heavy offshore use"....and racing. Straight from the Amsoil reps who had a display tent at the St. Clair Michigan OSS race...

So in that case Mobil-1/RP/Torco/Redline are just as good as Amsoil's "extreme gear". Take your pick...unless you like Mercury HP....the synthetics have an edge probably...HP is semi-synthetic.

Amsoil's former Series 20000 Gear lube was a heftier product apparently than the current offering. Teague liked Series 2000 and I did too...it's like they reformulated Coke...why? :rolleyes:


I had a feeling about this... :p

Originally Posted by o2man98

Hydro,

I believe you are referring to the "Severe Gear" gear oil. This one: THIS ONE at AMSOIL

Originally Posted by offshoredrillin

got a thread going in GD, my oil distributor has 139 cases of mobil 1 20/50 v twin he is willing to let go for $36 a case, equals out to 6 bucks a qt plus shipping...let me know..Rob

Originally Posted by myturn

I am interested! How do I order?

Originally Posted by offshoredrillin

got a thread going in GD, my oil distributor has 139 cases of mobil 1 20/50 v twin he is willing to let go for $36 a case, equals out to 6 bucks a qt plus shipping...let me know..Rob

Originally Posted by offshoredrillin

got a thread going in GD, my oil distributor has 139 cases of mobil 1 20/50 v twin he is willing to let go for $36 a case, equals out to 6 bucks a qt plus shipping...let me know..Rob

Originally Posted by SeaRay Jim

I can only add this. I was running Valvoline in my NA 540 last year for the first 40 hours or so. Also recommended but I changed it at about 10, then every 15-20 hours there after, then again before winter. This year I switched to Amsoil 20w-50 Racing and WOW, what a diffeence. I'm running 34 MPH faster......just kidding of course.

However, what I did see was that the motor seems to rev quicker, which may not be an issue in a boat, but it does. It also starts much easier. With the Val. (I ran 50w Racing) I might have to restart 3-4 times when it was cold. By cold, I mean the motor, but the temps. The temps could be 100.

With the Amsoil I start it one time and it'll idle at 800-900 RPM and it's ready to go in just 1-2 minutes. With Val. I had to let it warm up at 1000-1200 RPM for a few minute it seems.
Been running it all season so far which is about 25-30 hours this year and it's great.

The other thing is oil pressure is much more stable. OP seems high when cold, but when it got good and hot after a hard run, would be lower than I liked. Now cold it's not as high, but hot it's barely any lower. Much more consistant in the 65-75 psi range. It seems to handle the heat much better.

It also seemed ot use about a quart every few hours, but nothing more than what Merc. says is OK for a 502. I had to top off with a little over 1/2 quart at about 9 hours. With Val. I would have gone through 2 quarts easy.

Nothing scientific, just what I've seen so far.

Originally Posted by RaggedEdge

Hydro,

Can you explain why the synthetic would reduce the oil consumption as stated here ? I can understand the basis for the other noted advantages but the reduction in oil usage is not clear to me at all.