Most of those cars in their day could not hold $7 in gasoline in their tank. My lawnmower holds almost that much now days.
we filled them up for 35 cents a gallon back then.
We always had big station wagons. Many times would get caught short on money on a fishing/hunting trip with my buddies (high school). But could always count on the spare change in the ash tray to fill up the tank to get us home.