my question is when its so much lighter weight to have a oil system in fuel why would you want an oil system like what cars have?
Gasoline is now $4.00 a gallon, but what some may not know is that motor oil is now almost $4.00 a quart. Not the synthetic oil either. So if you mix 20 gallons of fuel with say 50:1 thats 1.6 quarts or $6.40 of oil. If the vehicle gets 20 miles to the gallon thats 24 quarts of oil compaired to say four or five quarts every 6,000 miles. I suspect a larger engine may require higher ratio's of oil. That is why we don't use once through oil systems.
BTW they had two strok SAAB's that had oil mixed in the fuel. I think they added about a quart to a 10 gallon tank.