You do NOT want to run crankcase oil in your car unless you are prepared to $pend megabucks filtering it.

Metallic particles will be the death knell of your IP AND cylinders.

As mentioned long ago I heat my house with crankcase oil which simply necessitates 3 stages of filtration and a plenum/preheater arrangement,in this case a propane burner to get the oil up to vaporisation temp.

Essentially every cycle the propane comes on for 1-2 minutes and then thermostatically shuts off and the heavy oil is ignited,no fuss,no muss,twice yearly cleanings are de rigeur.

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