[whatthe]

Any of the Suzuki G10 or G13 clan should get you 40-45mpg depending on how you drive.

4 cyl - Suzuki Swift base and GT

3 cyl Chevrolet sprint, pontiac firefly, geo metro

In Canada, I don't think a/c was even an option, but in some areas they do exist.

You'll never want to be in an accident with an 1800lb or less car with a 7000lb Cadillac at high speeds. The math just isn't favorable despite whatever crash design may exist.