Motor Oil/Diesel Mix in a Cucv?

I was wondering if I could run any concentration of motor oil and diesel in my CUCV. If I can, would I have to filter the oil first, seeing as it is used. If I do, what would I use to filter it?
Thanks,

you might get by with one gallon in 20 (5%) like the big truckers do..however filtering it thru a mesh fuel filter funnel is no fun unless you heat it to get the viscosity thinner... Then of course you risk clogging the fuel filter on the CUCV which costs more than the savings of burning the oil...my approach is to give my used oil to the shops with waste oil burning furnaces in return for a favor in the future..