[Old Tele man]

...a LOT of people during WWII ran their cars on gasoline+kerosene (or used white-gas) due to war-time "rationing"

...my Dad told me about "wrapping" the fuel line (loosely) around the exhaust manifold to enable running on the gas+kerosene mixture AFTER the engine was fully warmed up; had to switch (valve) between two different tanks in the process: start on gas, warm-up on gas; then switch over to kerosene for driving. Of course, EPA didn't exist then!