3 ms·

Hey isalmon, fuel efficiency is not related to the speed limit. We just use that as a frame of reference. The actual numbers are that fuel efficiency drops by 1

by thejo 14y ago

Hey isalmon, fuel efficiency is not related to the speed limit. We just use that as a frame of reference. The actual numbers are that fuel efficiency drops by 12-15% for every 10 mph above 50 mph. Here's an article which talks about that - http://www.greencarcongress.com/2013/01/thomas-20130117.html http://www.greencarcongress.com/2013/01/thomas-20130117.html

isalmon 14y ago
Well, I guess you should clarify it then on the website? Does not really help your credibility ;)
mistercow 14y ago
That data includes cars going back to 1984. From what I have heard (and have no citation for this), newer cars remain efficient at higher speeds than 50 mph. Do you know if that's true?