Most cars today draw air for the PCV system from the air cleaner housing so this filter is not needed, but if your engine has one, replace it at 15,000 mile intervals as well.

• 现在大多汽车从空气虑清室内取PCV系统需要的空气，因此就不再需要PCV过滤器了。但如果你的爱车还有的话，最好每15,000英里行程更换一次。