b10 gear box

[AlfredGarner 0]

Hello: What weight oil does the gear box take. Thanks Al

[Kent 435]

Originally they called for 80/90 gear oil, but some people are running the newer, thinner Simplicity Multipurpose Gear Oil in them.

[AlfredGarner 0]

Thanks Kent

[RayS 79]

I was running the Simplicity Multipurpose oil in a BGB that I just rebuilt until my dealer told me that he would drain it and go with the 80/90 gear oil. He says that the BGB will last longer. I now am using 80/90 mobile one synthetic oil.

[Simplicity314 0]

I use 6 oz. Valvoliene 85-90 gear oil and 2 oz. Lucas oil stablizer. (I think it takes 8 oz.) There was another post not too long ago where the author said he used 4 oz. Lucas .