How is fuel consumption measured in UK?

In the UK we measure a car’s fuel economy in miles per gallon (MPG). If your car does 30MPG, it will cover 30 miles on one gallon of fuel. The higher the MPG, the more economical the car and the less you’ll spend on fuel. The higher the MPG, the lower a car’s environmental impact.

Does fuel consumption increase in cold weather?

winter. Cold, dry winter air is 11% denser than warm, humid summer air, which increases wind resistance. Consequently, highway fuel consumption increases by approximately 1.3%. The average wind speed is also higher in the winter, which increases aerodynamic resistance and fuel consumption.

How do you measure fuel consumption?

Calculating a vehicle’s fuel consumption is not difficult. Simply note down the distance travelled since the last top-up and then take a note of how much fuel it consumed to travel that distance, then divide the litres used by the kilometres travelled and multiply by 100 to calculate consumption in litres/100km.

Does engine temperature affect fuel consumption?

Cold weather and winter driving conditions can reduce your fuel economy significantly. Fuel economy tests show that, in city driving, a conventional gasoline car’s gas mileage is roughly 15% lower at 20°F than it would be at 77°F. It can drop as much as 24% for short (3- to 4-mile) trips.

How is WLTP used to measure fuel consumption?

WLTP uses new Worldwide harmonised Light-duty vehicle Test Cycles (WLTC) to measure fuel consumption, CO 2 and pollutant emissions from passenger cars and light commercial vehicles. The new protocol aims to provide customers with more realistic data, better reflecting the daily use of the vehicle.

Are there new ways to test fuel consumption?

New ways of testing fuel consumption and emissions are being introduced. They should make official fuel economy and car emissions figures more realistic…

How are the official fuel consumption figures calculated?

Three official fuel consumption figures are calculated: urban, extra-urban and a ‘combined’ figure which is a weighted average of the other two The basic test cycle was developed in the 1970s and doesn’t properly represent modern driving patterns or vehicle performance.

How are fuel consumption and CO2 tests carried out?

In order to be placed on the market, passenger cars carry out a series of tests to verify their compliance with regulations. The tests to assess fuel consumption, CO 2 and pollutant emissions are carried out in the laboratory and are based on specific driving cycles. In this way, the tests are reproducible and the results comparable.