I have had situations where I've actually gotten better mileage while driving faster than at a slightly slower speed. Mainly, this was on a T-bird I owned years ago. It just seemed like the gearing in the car allowed the engine to really free up (I don't know how else to put it) at highway crusing speeds around 65-70 (and 27mph out of a 305), but at 55 I got horrible mileage.
BTW..as my G3 Vulcan gets older, it's getting better mileage. At 70,000 miles, we got 30mpg during an Alabama to North Carolina run. And this is roughly 67-75 all the way.
BTW..as my G3 Vulcan gets older, it's getting better mileage. At 70,000 miles, we got 30mpg during an Alabama to North Carolina run. And this is roughly 67-75 all the way.
