Favourite gear oil?

[vroom ZOOM]

Hello

Just curious has anyone used anything but the mercruiser high performance gear lube in their outboards and sterndrives? Stuff like lucas or amsoil or is there maybe another big brand name good marine synthetic gear oil that someone would reccomend?

 

[nola mike]

I think Bondo uses mobil1. I've used Sierra, but it's pretty much the same price as the Merc. There are allegedly emulsifiers in the marine stuff that helps if you get water in there, but who knows. I haven't seen many/if any reports on drive failures that weren't due to water intrusion/low oil/doing something stupid.

 

[alldodge]

Many use amsoil Extreme and Merc full synthetic racing gear lube on OSO

I use Merc HP in my Rinker and Merc Racing Syn in my Formula

 

[vroom ZOOM]

yeah ok thanks for the suggestions I am more after availability rather than cost, all the merc HP shelves are empty out here

 

[alldodge]

I order my stuff on line. Last time I bought 5 gallons of the racing
92-8M0078016 and cheapest price is at partsvu

https://www.partsvu.com/gearlube-5-gallon.html

 

[Bondo]

Ayuh,...... Any of the name brand better full-syn oils are just fine,......

As Mike said, I use mobil 1, 75W-90,..... If that shelf is empty, I use the Pensoil,.....

 

[vroom ZOOM]

ok sounds good. one more thing. there are three types of oil i am seeing, 75w-90, 80w-90, and just sae 90. which one is better and does it really make a difference?

 

[Spidrmunky]

I use quicksilver sae 90 high performance gear lube. Have used Sierra as well. Both worked for me

 

[Bondo]

75w-90, 80w-90, and just sae 90. which one is better and does it really make a difference?

Ayuh,..... 75W-90 is syn-oil,..... the other 2 are mineral oils,....

 

[vroom ZOOM]

ok, thanks, now it makes sense!

 

[vroom ZOOM]

ok I will go with the amsoil marine synthetic. supposedly good stuff and the good thing is they have it in stock and it's 3 bucks/L cheaper than the merc stuff.