SANTA ROSA − Most people know tire pressure can affect fuel economy, but there are several lesser-known factors that can have an equally significant impact. One of these is the condition of your engine air filter. When an air filter isn’t regularly replaced, the excessive dirt buildup can cause it to become clogged, which restricts engine ventilation. When an engine isn’t able to “breathe” properly, it’s more likely to run rich—in other words, to use more gasoline than it’s supposed to.
Another factor that can affect fuel economy is the regularity with which you change your engine oil. As engine oil becomes dirty over time, it can clog up the engine’s rings and get into the cylinders, which can hinder proper combustion.
In addition to routine oil changes and air filter replacement, another way to boost your vehicle’s gas mileage is to keep its engine well-tuned. Having important functional components like the crankcase ventilation system serviced on a regular basis will help the engine perform optimally, which will maximize fuel economy.