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( Miles per gallon)
Miles per gallon (MPG) is a standard unit of measure (a metric) that measures how many miles a vehicle can travel on one gallon of fuel. It is used similarly in North America and the United Kingdom, although the U.S. gallon is 80% of the Imperial gallon used in the UK. Most countries other than the US and UK use the SI (aka metric) units litre (0.22 Imperial gallon or 0.264 US liquid gallon) and km (0.621 statute miles). These can be combined to either km/L (efficiency) or L/100km (consumption). The UK is a special case in this respect, as distances are measured in miles but fuel is sold by the litre. As a result, both MPG and L/100km are usually quoted for any given vehicle, although the general public almost exclusively use miles-per-gallon. Note that because the imperial gallon is significantly larger than the U.S. gallon, MPG figures are 20.095% higher in the UK than in the U.S. for the same real fuel economy. if 1 Litre ˜ 0.22 Imperial gallon then One should note that MPG works differently than litres per hundred kilometres. l/100km denotes a rate of fuel consumption, while MPG is a measure of fuel economy (or 'gas mileage'). If a car uses less fuel, the MPG increases, and l/100km decreases, but the percentages will not match, because the values are reciprocal.
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