, car, Cadillac ambulance 1974 2.jpg
That ambulance probably weighed around 6000 pounds and probably got around 7 miles per gallon. Not a very economical car to take to the wilderness, but you could stand up in it.
I know that the EPA had only a single (not separate city/highway) MPG rating list in 1974 and I think that was the first year for it. In Thos. E. Bonsalls "Cadillac The American Standard" there is a reprint of an advertisement Cadillac sent to dealers in 1974 to run in local media, this one from Valley Cadillac. It states that the Environmental Protection Agency made a study recently of gas mileage delivered by 376 new automobiles and that the Cadillac Eldorado was found to deliver 10.4 MPG, the de Ville 8.9 MPG (I dont understand why thered be a difference), and also listed some other cars including Lincoln 7.9, Chrysler 8.4 and smaller cars like the Pontiac Le Mans at 8.4 and Oldsmobile Cutlass at 7.3. 1973 and 1974 were probably the two worst years for fuel mileage on GM cars with very restrictive emission controls which gave both poor economy and poor drivability. In 1975, all GM cars got catalytic converters which allowed the engines to perform better and give better economy. By 1976, the EPA was listing both city and highway mileage and I still have the EPA window sticker from my 76 350 4BBL (Olds engine)Cutlass which shows 15 city and 21 highway. http://forums.cadillaclasalleclub.org/index.php?topic=85736.0