My 68 Beetle normally got 34mpg and was great in snow. The cooling fan pressurized heater air flow through the exhaust pipe heat exchangers was weak even when it worked. But normally you didn't have to worry about recirculating the exhaust through the heating system because the heater door mechanism would rust shut during the summer when you weren't using it so you couldn't turn the heat that next winter. You spent a lot of time in cold weather wiping fog and frost off the inside of the glass as you were driving. Maintenance required was typical for cars of the day, adjust valves and points every 3000 miles, but you didn't have to fuss with radiators and coolant levels as you did with most other cars of the day.
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