Generally filter service cycles have been extended over the years, particularly when oil bath air filters, 2000 mile chassis greaseing & oil changes, and vented oil pans were discontinued. What still can be found in most car manuals is a disclaimer for operating under severe service conditions. Such as cold climate, short trips, dusty, stop & go traffic, extended idling periods, extended high speed operation, trailer pulling etc. which cuts normal maintenance interval in half.

Changing air filters & oil is highly subjective and an individual decision based on his operating conditions, and driving habits. I SWAG it with air & cabin filters, and change oil normally every 3000 – 4000 miles because of our inhospitable climate in Maine for cars six months of every year.

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC

buy a K & N or fram cleanable filter...one filter and bottle of cleaner and oil......pull and clean before starting oil drain....replace oil inengine then oil fiter and you good to go .....usally about the first thing I buy for my car/truck/bike....buy one and by time you cleaned it 2 or 3 times , it has paid for self...most of the time I notice increase gas milage aslo

The BITOG Air Filtration Test seems to indicate that low-restriction cotton-gauze or foam air filters do not capture as much dirt as standard pleated paper or fiber filters.

…unless you actually want to prevent abrasive dirt entering your engine, in which case stick to real (i.e., paper) air filters. See here to cure any lingering marketeering-induced misconceptions about K&N and similar "filters". There is no increase in fuel economy or performance from these "filters" because the throttle plate, and not the air filter, is the bottleneck in the intake tract.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

The right answer, technically speaking, is the measure the pressure differential across the filter. Aside from this, actual change intervals depend on the environmental conditions you operate your vehicle in.

Mitch

I agree. If anything they decrease economy.

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'73 Scamp (the girlfriend): 225ci super/6 2BBL conversion (Almost done!)
'90 Subaru, wagon (the wife): H4-cyl 2.2L

1977 Mercedes-Benz 300D, 5cyl diesel(For sale!)

http://www.wixfilters.com/

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1964 Dart GT