Originally Posted By: EyesofThunder
Right sorry didn't word it well. Zero crude in a quart of motor oil.
Rephrased. How my crude oil is needed to be distilled or processed to end up with 1 quart of petroleum motor oil (including additives). Probably no way to get an answer.
I think you're looking at this the wrong way. The answer is about 1 quart, but that's not to say that if you start with a quart of crude oil you can create a quart of motor oil. Crude oil has a large number of components of which only a few are suitable for motor oil, but the others are useful for products ranging from light elements (gasoline) to heavy (asphalt).
If motor oil was the only thing you wanted, there would be a large amount of waste in barrel of crude oil. Thankfully, other crude elements are useful for other things.