My dad when a kid used to take the model t out for the evening to galavant around the back roads of northern Indiana. they'd start out the evening with some gasoline in the tank and start the car up with gas, then when it was warmed up they would top it off with kerosene and put a gallon of gasoline in back. Then they'd run around until the kerosene ran out and fill it up with gasoline and head home. With gas in the tank so it would start next day. this story is prompted by the comment about four to one compression.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.

[SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.