mnaquaman wrote:
Does your air filter housing have indicator on it? If it does do not change it until the indicator says too. Studies have shown that most dirt inters the system during filter removal. Instruct whoever changes your oil to do not remove the air filter.
One reason to check an air filter is the fact that mice can make a home in there. Should a hole be chewed thru the media, the indicator will show good even though no filtering is happening.
Just Google for images using "mice in air filter" if you want to see what I am talking about. RV's often sit for long periods, and may have more than their share of rodent residents.