So if it is important to replace an oil filter at least once a year, is it practical, common, good maintenance, or over charged, unnecessary to charge for 3 oil filters to be replaced in the vehicle for the time period around the following dates of service repairs that list these parts charged for replacement: 1. Between Jan.10 and Jan 30, a service charge for oil filter - 2. Between April 30 and May 15, a service charge for oil filter- 3. Between July 09 and July 13, a service charge for oil filter, and not to mention, the mileage between #1- being 89,130 miles, and for #99546 and #3 being 104,821 miles; these all don't seem suspiscious?