Keeping your car moving under the speed limit is one of the tips that commonly appears when people talk about saving fuel. It's probably one of the tips most people respect the least, though, which can bring joy to some traffic authorities can then "remind" motorists - via a ticket and a fine - to drive slower. A website
created to promote slower driving has even published a complete report on how much time you really save
when you drive above the limit. Surprise: it's not much. For instance, for a 20-mile commute, at a sustained speed of 70 mpg (15 MPH over a 55 mph speed limit), you only save around five minutes. If five minutes is the trade-off at the expense of higher carbon emissions, maybe it's time to re-think what that time is worth. Thanks to Ryan for the tip!
[Source: Drive the speed limit