Driving at 70mph uses about 15% more fuel than driving at 60 mph.
Most cars run at their most efficient -- in terms of miles per gallon -- when they are running comfortably in 5th gear. The way American cars are manufactured that's about 50-55 mph. The way European cars are geared, that ideal point is about 60 mph.
You usually know when you're out of the ideal comfort zone for 5th gear by the RPM passing above 2500, and the engine making a racket.
Below or above these optimal speeds, the car is using more fuel per mile (and thus producing more carbon dioxide). But that's not an excuse to do 55 in a 40 zone, either!
Read more about the "Go Slow" movement here.
Most of us drive as fast as we can get away with just to get where we're going. Our first reaction might be to think that going 60 on a dual carriageway would just add too much time to most journeys. But would it? Over a two hour journey driving 60 and not 70 would only add 20 minutes, which isn't a heck of a lot extra, is it?
And over an 10 mile journey on dual carriageway, driving 60 / not 70 would only add about 1.5 minutes to the journey -- which is nothing at all, truly.
Most cars run at their most efficient -- in terms of miles per gallon -- when they are running comfortably in 5th gear. The way American cars are manufactured that's about 50-55 mph. The way European cars are geared, that ideal point is about 60 mph.
You usually know when you're out of the ideal comfort zone for 5th gear by the RPM passing above 2500, and the engine making a racket.
Below or above these optimal speeds, the car is using more fuel per mile (and thus producing more carbon dioxide). But that's not an excuse to do 55 in a 40 zone, either!
Read more about the "Go Slow" movement here.
Most of us drive as fast as we can get away with just to get where we're going. Our first reaction might be to think that going 60 on a dual carriageway would just add too much time to most journeys. But would it? Over a two hour journey driving 60 and not 70 would only add 20 minutes, which isn't a heck of a lot extra, is it?
And over an 10 mile journey on dual carriageway, driving 60 / not 70 would only add about 1.5 minutes to the journey -- which is nothing at all, truly.