The Effects of the Hot Air Intake on Gas Mileage


Hot air intakes are after-market devices that can be installed on cars to increase gas mileage. This effect has several advantages for both the cars and drivers.


  • The hot air intake functions by drawing in air from near the engine, which has been heated due to internal combustion. This warm air causes the fuel mixture in the car to drop, thereby lessening how much fuel is used and increasing mileage.


  • Hot air intakes can be purchased in kits or built in a do-it-yourself fashion. Kits are generally more effective at increasing gas mileage, but DIY construction saves money on the initial investment.


  • To identify a hot air intake, look for a rubber or metal hose coming out of the engine, passing through an air filter, with an opening somewhere near the engine block or radiator.


  • Warm air intakes add some bulk to the engine in terms of space, since extra hoses have to be installed, but they only weigh a few pounds so they have no weight-related adverse effects on the engine. However they can still provide an excellent boost to gas mileage.


  • Before installing a hot air intake, you should check with the manufacturer of your vehicle to ensure that the vehicle will not be adversely affected, as some cars have specialized engines that should not be modified in an attempt to increase gas mileage.

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  • Photo Credit Image by, courtesy of Ramon Llorensi
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