Purolator PureONE Air Filter is an effective air filter which will help save your engine from costly damage, and a clean air filter can help you save money at the gas pump. Step up to a Purolator PureONE air filter and get twice the capacity of conventional air filters. A Purolator PureONE air filterâs oil wetted micronic media traps more particles of dirt and grime and has twice the capacity of conventional air filters. In simpler terms it means that when the PureONE air filter was tested head-to-head against other air filters, PureONE air filters trapped double the contaminants allowing fewer contaminants to get into your engine and cause damage. A clean air filter can improve fuel economy by up to 10 percent. A simple air filter change can help keep money in your pocket where it should be. So replace your dirty air filter every 12 months or 12000 miles with a clean Purolator PureONE air filter and help your engine and your wallet.