It's 1967 and Oldsmobile engineers get serious about fuel economy

Thus the Cutlass Supreme F85 Turnpike Cruiser is born.

Quote:

AUTO INDUSTRY observers long have predicted Detroit would build cars specially designed for long-distance, high-speed cruising on tomorrow's super highways. These cars would be considerably different from cars intended for normal city-suburban transportation. They would be designed for smooth, effortless cruising at 60-90 mph, with a minimum of engine vibration and noise. Fuel consumption at 80-90 mph would be what owners now expect at 50-60 mph. The handling would have to be firm and stable, especially in crosswinds, but without a harsh, choppy sports car ride. Very important, the acceleration in the normal passing range, from 50-70 mph, would have to be up to current 400-cu. in. engine standards, with no great compromise for high-speed fuel consumption. Just such a car is available now at Oldsmobile dealers. The car represents Detroit's first serious effort at a specific car design to meet the challenge of the 41,000-mile network of interstate super highways to be completed early in the 1970s. Efficient, high-speed, long-distance travel on these highways calls for a very special combination of equipment that cannot be readily "designed" on current option order forms.

Oldsmobility/carlife_apr67

It's 1967 and Oldsmobile engineers get serious about fuel economy