What is the gas mileage for a 1967 Cadillac Sedan Deville?

The gas mileage for a 1967 Cadillac Sedan DeVille is notoriously low. There's no single number, as it varied depending on engine size (a 429 or 472 cubic inch V8 were common), driving conditions, and the car's condition. However, you'd be lucky to see more than 8-12 miles per gallon (mpg) in typical driving. In city driving, it would likely be significantly lower.