For those of you who recycle your old/used motor oil, have you also mixed in old trans fluid and differential fluid? I talked to a buddy, and he has done it before and he also states that pretty much anything (car related at least) with OIL will usually be accepted by places that recycle old oil...so long as there's no gasoline in it.

Also, anyone know how the old oil is recycled?

 

in the army, we mix all types and weights of oils. 15/40, 30 wt, 10 wt, 80/90, 85/140. the contractors we turn our old oil into tell us as long as our oils, coolants, and fuels (by type) are separate, it doesnt matter. dont know how all this translates to the civilian world though. hopefully i helped you some

 

transmission fluid and motor oil can be disposed of mixed at any center that takes them.

 

Mine goes to my power company who burn it to produce electricity.

 

i miss my old ford diesel, i would just put the old 'oil' through a 2micron filter (iirc) and then just run it through my motor my truck had ~400,000 Miles before i left it in the states, my Dad is still driving it.