The manual for my 05 KQ says to use Mobil Fluid 424 or equivalent for the rear differential. I can't find this 424 stuff anywhere. What do you guys use?

 

I am with you. I could not find that mobill stuff anywhere. I went over to my local Kawasaki dealer and got a qt. that they use in the brute force rear ends. I assume it is the same stuff since they are the same rear ends. It works fine and is designed for the wet break systems.

 

Yes you can get the "wet break" oil at some places, but don't. Just go to the dealer and get suzukis brand. Its not that much and why take a chance. Change eng oil often. Don

 

The Kawi stuff is the exact same 424 oil. So whichever dealer is closer, that is what I would go with. Heck, my Suzuki dealer sent me to the Kawi dealer when he didn't have any.