Driving home from Devon today, I decided to stick the limiter on at 65mph for most of the motorway stretch. That worked out very nicely. Not too much overtaking to do and I got the average MPG up to just over 62.

Even if it were possible to travel at your chosen speed all the way, it wouldn’t add too much to the journey time compared to 70mph. I’ve got another longish drive coming up soon so I’m tempted to see if I can reach 63 MPG at 63mph.