I can certainly understand ones reluctance to use a recycled oil in their car, but look at crude oil that is initially used to make the oils (as well as gasoline and diesel) we all use today. You'd certainly never put that in your car, either. I'm much less concerned with what the product started life as than I am with what the resulting product is.

Even pure synthetics like Mobil1 start life as dead dinosaur juice. It's all in the refining process and the additives put into the oil that make it what it is. If sea water treated, and even waster water recycled, to make drinking water, why can't there be a viable process to recycle motor oil?