I find it funny that some of the average cars of old get about the same mileage as the average cars of today. I drove a 65 fury with the slant 6, and it got a rock-solid 20mpg. In town, or on the highway, always 20mpg. I know because the gas gauge was broken, so I had to drive by the odometer and my gas-station receipt
That car was so long I about had to hit the back wall of the garage just to get the door to close behind it!