Mercury Gear Lube Questions
 

What is the best Mercury brand gear oil now and who has the best price on 1 qt. containers? Thanks.

The best Mercury Gear lube is actually Amsoil 110 or the 140

Amsoil is for sure some real good stuff, ran it for many years.

To answer the above question, Merc Racings best, and latest is the new Extreme Performance 85-90 Gear Lube. Per a Merc Racing bulletin it is the recommended lube for all perf drives from the Bravo XR to the M8. I bought it for my new drives, if for no other reason than to run what Merc calls for during the warranty period. If they take a dump it's going to be with their lube.

It was mostly a joke. Depending on what you are looking for, I think the thicker stuff makes drives last longer. For some reason, I think the new Merc Racing oil isnt as good as the old performance blend.

I ran the Amsoil and did have pretty good luck, I have no clue how good the newest Merc Racing lube is, but like I said if they take a dump it's not going to be a blame game. Had this lube conversation over the weekend with a Merc drive "Guy" and his comment was to change it often, never let it get old. Gear lube is the most batted around topic on this site, who the fock knows.

I would agree the thicker might be more protection,
but mine was just a tick faster with the lighter. :-)

No doubt, I actually started using the 140 believe it or not. Yes, it was 1 MPH slower but drive rebuild intervals got way shorter. There are some guys that race with 10-40 and pick up even more speed.... but we both know it just isnt worth it.

Have not used it yet, I had large supply of the High Performance Merc stuff. Will need toreplace supply this sspring. So I'm listening if this new stuff is better or not.

Mercury Racing Gear Lube 85W-90 1-Quart #8M0078015

• SAE 85W-90
• For use in Mercury Racing gear cases
• Do NOT mix with any other gear lubricants
• For use with gear lube pump 802891K2
• 32 fl oz plastic bottle

Mercury Racing Gear Lube was designed for outboard and sterndrive racing applications. This gear lube provides maximum protection against: • Water intrusion – advanced emulsifiers protect gears if water enters the gear housing • Wear – tackifiers and pressure additives improve oil film adhesion and protect against excessive wear • Horsepower loss - prevents horsepower loss and won’t break down when gears reach high temperatures

Recommended for use in Mercury Racing outboard gear cases including: Sport Master, Torque Master, Fleet Master, VI SSM and IV SSM and Mercury Racing sterndrive applications including Dry Sump Six,NXT6, SSM, NXT, Bravo XR, Bravo XR Sport Master drives and NXT transmission assemblies.

http://www.mercruiserparts.com/conte...earlube-hp.png

Sorry, don't know what I did and there is no size options on the lettering to fix it.

I didn't need my glasses to see it. That's what I use

A 90 wt gear oil will have the same viscosity characteristics as a 40 wt motor oil at 210 F. A 40 wt motor oil vs a 140 gear lube, the 40 wt will be thinner.


Just talking viscosity here, nothing else.

Ken

Am i the the only one that runs the amsoil 75w-90 marine gear lube? Seems like everyone runs the amsoil anything but marine.

Actually, I'd say 95%+ of those here that state they use Amsoil gear oil never state what the heck Amsoil they use. Once in a while someone will state they use Severe Gear, but of course don't state what weight. Same with Redline, they'll just state shock proof, but not which one
j
Drive's me nutz. LOL.

The new Merc Racing lube is probably the best. No sure who has best price and I can't get it locally without a special order.

Cheapest Merc Hi Performance Gear Lube is the Quicksilver HP Gear Lube at Walmart for $10 a quart. It is EXACTLY the same as Mercruiser with a QS label.

Many are starting to use 75 / 80 w - 140 of different brands.
I like Driven oils

Been using the Amsoil marine gear lube for years - it is more resistant to water than the severe gear. Doesnt gel up in the reservoir like the green stuff. I also read somewhere that the new formulation of severe gear was causing cone clutch problems.

Griff, High Performance has been the entry level ( standard bravo, etc) oil for a few years now. Extreme Performance is designed for Xr thru #8s. The new Extreme oil is brown versus old top of the line HP blue. The new High Performance oil is brown. Hope that makes sense. I have seen the High Performance at Wal Mart but not the Extreme Performance.
I called Merc last year to get the correct info for my XRs.

Amsoil Marine Gear here as well. Severe gear didn't specify marine use so I dare not fill a submerged case with it.

Keith

I`m running this purely because it`s synthetic and found at O'reilly


https://lucasoil.com/products/marine...arine-gear-oil

I appreciate all the replies. I didn't intend to start another debate on gear oils! I'm going to stick with Mercury but last time I bought the green "high performance" oil and not the latest and greatest which I guess is the Mercury Racing 85w90. Gotta get some ordered soon as winterization is coming up. :(

Yep, I aware of that.
I was trying to say the Merc HP gear lube(green) was exactly the same as Quicksilver HP Lube except for the label and is only $10/qt at Walmart compared to $17/qt at a Merc dealer.

I run the marine and always have. When George at AADS was rebuilding my drive this summer, he asked which Amsoil I used. He said he used to run the Severe Gear but started losing cone clutches after what he believed to be an additive or formulation change by Amsoil.

This is what I want. Amazon doesn't have it and a google shopping search came up blank! If no one knows where to order it I guess I will call around.

If the newest and best is "Extreme Gear Lube" - why doesn't it say it on the bottle?? From a marketing perspective, wouldn't it sell better?? (whether you needed 'Extreme' or not, it's got to be better and 'faster', right?? LOL)

That's what threw me off on my last oil change. I bought the old green hi-per oil and then found out that there is a better lube out now. So the old "latest and greatest" says High Performance and this one says Mercury Racing. 🙄

The Merc Racing you are looking for is no longer made. That bottle with the blue oil and the brown label has been replaced. Quicksilver Extreme is the new stuff, brown oil now. The new Quicksilver Hi Performance is the standard everyday gear oil, not what you want for your set-up Thirdchildhood.

100% agree, the marketing is screwed up and the names are confusing. Should have wiped the slate clean and used new branding. Merc missed the mark on this one creating a bunch of confusion.

I am a bit lost here why amazon and google and all this typing time to figure out products and part numbers ?--- ones local dealer can due this in one minute plus why not support your local dealer with buying marine stuff. I am not saying to spend thousands but your local marine dealer pays taxes, employees people in the area, puts on boating events - supports local lakes, Also some even offer free classes on maintenance and how to tech women to drive boats.

Also some dealers and or their employees might be up here offering free help that they were trained on for years but their training was not free at all. Amazon and ebay and google are well off but some businesses in the marine industry can be struggling.

Not a negative post on my part just IMO for the marine industry it would nt hurt do a bit more in parts buying to help out the small guy in their local community on the OEM marine end.

For reference, I bought a few bottles of Mercury Quickleen from my local Merc dealer - was a few cents cheaper than lowest I found online, and I picked it up same day.

Wow. This is getting crazy. OK, I will look for Quicksilver Extreme!

My local dealers north of Detroit do not even stock the old High Performance gear oil. I found a hardware store in northern Michigan that does and I've been getting it there. Now I'm off to search for the new stuff. I would gladly support local business if they stocked what I need. I get my engine oil and filters at the local NAPA store.

Well I got the holiday behind me and looked into this. The "Extreme Performance 85w90" was not easy to find but Teague has it at $16.95/Qt. and I ordered some. They confirmed that it is the best gear lube offered by Mercury.

Buy Local and Support My local Dealer that owns 5 fast boats a crap load of cars and drives a Lambo to work.

That's one hell of mark up he made on selling 3 qts of gear oil LMFAO

For how much? Was $17/qt. at Teague.

Ebay is $17/qt also but also $9/qt for shipping!!

Eeek. Liquid gold.

Im runnin Slick 50 full synthetic..........:D

Super Tech 90 w with 8 oz of sea foam mixed in.

This might be a stupid question but what might be a good substitute for the Mercury Extreme gear lube?