Take the used stuff to Auto Zone and let them recycle it. You would really need to get all the metal particles out of the oil, like with a centrifuge. When that is done the oil is clean again, and you can add some additives and use it as crankcase oil again.

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D