Jack Frost has a frugal personality. He steals greedy sun tans, open sandals, and fuel economy. MPG disappears faster in winter than summer flying kites or girlfriends.
Sidekick SinsThe engine is often referred to as the sole culprit for poor fuel economy winter. However, it is only the ring leader. The mate, the tires make their own harassing. According to Christine and Scott Gable in her article, "It is winter ... What about my car Fuel Economy Happened?" Cold air tire pressure decreases approximately 1-2 PSI per each 10 degree Fahrenheit loss. As a result, the U.S. Department of Energy's fuel consumption is reduced lost 0.3 percent for every 1 PSI at fueleconomy.gov. Fact metrompg.com writing, notes that cold air a tire, rolling resistance stiffened increased.
Cruel coldOther culprits adding to the cacophony. With 4-wheel drive increased waste, says the U.S. DOE. It states that, with electrical accessories, such as windshield wipers, defroster, heated seats, etc. reduces fuel consumption. Finally, cold air is often accompanied by hail, snow and other forms of wintry hell. Slow ride through mud requires more work than smooth spring drive along roads.
Vicious viscosityEngine fluids and lubricants such as oil, transmission fluid, differential fluid and grease, thicken as they cool, says the DOE. The increased viscosity adds drag.
Poor performanceIn cold weather, many oil refineries actually improve the formula for gasoline to its vaporization and combustibility. But what it gains in an arena, it is sometimes sacrificed in another. This alternative formula as reformulated gasoline (RFG) is known, contains less energy per volume unit, said Greg Russell in his article "Miles Per Gallon Go Down in cold weather." In other words, a liter of petrol summer more potential energy than a gallon of gasoline winter. Therefore MPG is reduced.
Malicious mixtureRussell adds that engines do not burn gasoline, but a petrol-air mixture. Cool air is denser than hot air, and so contains more oxygen per unit volume. This phenomenon results in a sub-optimal composition of gasoline and air. Christine and Scott Gable note again that a cold air-fuel mixture due to the non-optimal composition which leaves traces of unburned fuel into the cylinder, reducing the performance and emissions. The DOE also says that denser air increases air resistance.
Temperature travestyEach engine has an optimum operating temperature. In cold weather, it takes more time for the motor to come at this temperature. Idle does not fix the problem. It's just further decreases MPG and increased emissions, says Russell. Cold car should be driven carefully until the engine temperature rises a significant amount.
And that's the cold, hard truth - or perhaps just cold.
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