This is probably way too general, but I figured it couldn't hurt to ask. My Comet with 144 ci 6 cylinder and 2 speed automatic does not get good gas mileage - somewhere around 14-15 miles per gallon, but it runs great. I bought the car with a rebuilt engine, but I'm thinking the carburetor might be the place to start looking for the cause of the bad mileage. Do any of you have any suggestions or advice?