The often ignored air filters Thursday June 03 2021 A mechanic shows off an airfilter. Replacing a clogged air filter can increase fuel efficiency and improve acceleration. PHOTO /ISAAC SSEJOMBWE Summary Air filters, often disregarded are essential in maintaining a car’s performance because they prevent small particles from entering the engine. Advertisement Because a car’s primary purpose is to move you from point A to B in all sorts of conditions, it is bound to take in all kinds of dirt and grime. This is why you shall always hear car phrases with ‘filter’ in them for instance ‘oil filter,’ ‘fuel filter, and ‘air filter.’