Virtually everyone who pays for fuel (that’d be most of us, then) is keen to make each precious tank of petrol or diesel last as long as physically possible.
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Some motorists, of course, take this obsession to ludicrous lengths, attempting to, say, decrease their vehicle’s rolling resistance by keeping two tyres on the white line, or trying to reduce the car’s aerodynamic drag by drafting (read “tailgating”) a large truck.
Read more on Motorburn.