Milne get drove every nice day, weather permitting.
I’d be ecstatic if I got 20mpg instead of 11.7 which isn’t horrible for a 500 mile round trip to the nats running 70mph
I was getting right at 17mpg on the hiway with a basically stock 4 barrel 318 and 904 transmission at 75-80mph.
When I went to the 5.9 Magnum with a 42rh overdrive trans that went to 25mpg on the hiway at that same 75-80.
I went to a bigger cube motor, but bringing the RPM's down on the hiway made the difference.
A 500 RPM reduction on the hiway is 30,000 less cylinders filling with fuel in an hour of driving.
That's a lot of fuel.
