Fuel economy at 65 mph vs 60 mph
What fuel economy increase have you observed from pulling your fiver at 60 mph vs 65 mph?
Forum Discussion
You're pushing the same amount of air out of the way at 60 mph as you are at 70 mph. Technically, like others have said, going slower will net a bit better mpg's, but overall with today's engines (specifically diesels), they are designed to be most efficient around 65-70 mph.
