best synthetic gear oil??

[klr]

I too use and believe in Amsoil, but I have on occasion gone with M1. I have a specific reason in regards to my outdrive on my Volvo Penta 4.3l on my boat. The nozzle on the end of the M1 75w 90 bottle installs perfectly so I can let it drain into the outdrive - it takes a couple hours.
The bottle sits there perfectly. very convenient, and I know M1 products are very good.

 

[Bror Jace]

Given that info from the Amsoil white paper, I'm more than a little surprised people are still recommending/favoring Royal Purple.

M1 is decent. I'm not fond of (nor surprised by) the shearing.

 

[RogerKlugerAus05]

I use Redline in the manual tranny of my Corolla and tfr box and diff of my Kluger(Highlander) and am happy to do so even after reading the Amsoil paper.
Roger

 

[jbl]

I am not so happy using redline in finaldrive and manualgearbox after reading Amsoil white papper.

I have already ordered MTG and SVG 75W90 to replace redline fluids in my XC70.

 

[unDummy]

Concerning the Amsoil test, its great for bench testing but in the real world, at what point will it make a difference? will you reach that point?

I have no problem with my M1, Redline, or RP fills. I will not change them out until I get 30k out of the fluid. No synthetic gear oil has ever failed me. I can only guess that I will NOT ever reach the point where it makes a difference.

That point can easily be reached by overextending the use of the gear oil, or overworking the gear oil, or by a factory underengineered component.

 

[jbl]

Im sure im not reaching that point. But i like to have the best. Cannot be sure Amsoil is the best since we havent seen all brands tested. But Amsoil is most likely on of them.

 

[gomes512]

This summer I have used 4 different brands on a front differential with an installed locker. Had some run in with some big stones, so each oil had only a max of 1000 miles.

I tried Valvoline DuraBlend (syn blend), Wally World SuperTech (dino), Mobil 1 (syn), and Royal Purple Max Gear (syn).

The Valvoline, Mobil, and R.P. all ran fine on the trails with no issues at all. I would open up the front diff cover right after running a trail... not by choice. No metal, foaming or anything else strange with those three (I believe they were all 140 weights). I was surprised with the Valvoline syn blend. It runs just as smooth as the full syns. I tried it in the rear axle as well and that usually whines without syn. But I haven't heard anything yet after changing it to the blend.

The wally-world super-tech 140 weight non synthetic... what a piece of garbage. As soon as I popped open the cover all I saw a nice big head of foam. It was like someone poured a Sam Adams pale ale to fast. I also spotted some metal shavings from the locker which freaked me out since I had not seen that before even after break-in.

Can't say anything about the super-tech synthetic gear oil, but for that price I'll stick with the Valvoline durablend.

Just figure I'd share my experiences.

 

[MysticGold04]

I personally think Amsoil. I upgraded to a 75-110w in the rear diff of my Tacoma that specs 75-90w. Reason being is its lifted and has a little bit bigger tires on it. I also like that you can do long drains with it as well.

 

[lazaro]

Amsoil gear lube improves fuel milage, this is why I use it, and it is cheaper than valvoline/mobil1 shelf oil here in florida.
no brainer

 

[artificialist]

Yes, Amsoil is cheraper than Valvoline, but I only purchased the Valvoline because limited slip additives were already mixed in by the factory, and I prefer it that way. Royal Purple was on sale for $9 a quart, that is why I got it at the second gear oil change, and it contained limited slip additives. Of course mom was paying for the chemical that I put in her car, so cost saving was not exactly priority #1. I never saw an Amsoil gear oil with the limited slip additive included. If there is one, I WILL use it in the future.

 

[Da Game]

Here's the link...

http://www.amsoil.com/products/gearlubes/WhitePaper.aspx

 

[Colt45ws]

The amsoil severe gear formulas have the LSD additive.

 

[buster]

fwiw, Redline is testing their gear oils in the Brookfield vis test and foam testing. They plan on putting out a response to the Amsoil paper.

 

[cos]

Buster,

Thanks for the update. Being a Redline fan/user I look foward to seeing that.

 

[RogerKlugerAus05]

The Redline response will be very interesting.
Roger

 

[Pablo]

Quote:

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fwiw, Redline is testing their gear oils in the Brookfield vis test and foam testing. They plan on putting out a response to the Amsoil paper.

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I knew Buster would contact Redline. What else did they say? Bad batch #56292/60840001663? Amsoil made the numbers up? Their fluid is better after usage?

 

[buster]

Quote:

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I knew Buster would contact Redline. What else did they say? Bad batch #56292/60840001663? Amsoil made the numbers up? Their fluid is better after usage?

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Actually I didn't contact them but a friend of a friend told me. They run these tests every so often to make sure their product is on spec, which most probably do. The #'s Redline has for their product on these tests is not what Amsoil has on the white paper. Not sure if it's a RL QC issue or what....no excuses here. It is what it is. If anything, RL will simply improve their weaknesses if they find it to be the case. I fully trust the white paper and as others have said, it makes the other guys pay more attention.