I am running the Redline Shockproof Heavy. I switched last year. I really don't like the sludge that the merc oil left in the reservior. If the oil was breaking down in the reservior, I wonder what it was leaving in the drive. Didn't have any sludge with Redline.

Other Synthetic. Richmond Gear 75-140 GL 6.

I was about to use Amsoil, mainly because it's convieniante. My local auto supply hcarries it and has it priced very competitive. Maybe I should stick to just putting it in the engine.

Amsoil does make a marine gear oil. And I believe 2 other grades, a series 2000 and a regular grade.

Is a bravo one driven boat l'be faster using the red-line or is it just different quality?

A tech at Amsoil said the proper oil for a Bravo is the ALU 80w90, not the Series 2000.

Although a different Amsoil tech said the 80W-90 (which is only GL-4 rated) is really for the average user while Series 2000 is better for high-performance, high-power applications.

yep the series 2000 is the better of the Amsoil products if you can;t find REDLINE ,
I don't normally sell it but I have red line for 6.80 a quart I can send you if it will help ,just p.m me :D :D

merc oil is synthetic. red line is the best. merc is 2nd.

teague sends the amsoil because he gets deals on it. he is the one who got me hooked on redline.

Treadwell

does ant one remember seeing the 5 gallon buckets at the mercury trailer in key west and what it said on them? i do... torco.
thats what i use.

this is what i was told by Imco when I bought my SC Extreme
 

Imco said they did use red line and said it was good oil but in their race boat that turns higher rpm's they said Redline was cutting it and they swithed to Torco.
They also said that is what Merc puts in their #6 drive ;)