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I am getting ready to change my gear oil and I have been reading the posts on the correct gear oil and didn't see anything on the use of this brand of oil. It's Lucas' high performance, heavy duty sae 80w-90 gear oil says it's excellent for use in race cars, trucks, RV's, and hypoid gears but nothing about motorcycles???
 

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I got to this thru the Lucas website by going to motorcycles and following the 80/90 links. It says they exceed all GL standards.


http://www.lucasoil.com/images/medialibrary/8090_gear_oil.pdf


I'm not an amsoil guy, although I will try the motor oilwhen my stock of Yamalube4 runs out (by this spring I'm sure). There was for awhile a lot of ink floating around on the GL-4 tests and amsoil jumped on it for marketing reasons so I don't know how much is hype. Still, from the volume of stuff out there on the net,I'm not sureifLucasgear oil isaffected by aGL4 standards test failure I want to mention it in case itis important. The claim is the Lucas gear oil exceeded viscocity before test, then lost too much viscocity during test, but I think they were testing at 75/90 standards and the Lucas 80/90 passed the 80/90 test.I think what they are really saying is theamsoil also passed the tougher 75/90 standards test, what that means in the real world who knows. I can't find Lucas firing back so maybe its true, but maybe its meaningless too. Of course our bike runs hot, so here's the stuff.


http://www.endurancesynthetics.com/lucas-oil.html


http://www.amsoil.com/lit/g2457.pdf


I did a search for "SAE J306 shear stability requirements" but there's too much stuff and I gave up from boredom.
 
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