Don't laugh... Inquiring minds want to know. 20 years ago... 30 yrs ago my dad used to buy recycled 10w-40 for our tractors and trucks etc. If I recall it was half the cost. Anyway, I haven't seen it for a long time. What do they do with the oil that we drain from all our machines? I dump old ATF into the same can as my used oil. How do they process it and into what products does it find its way into?