In addition to standard maintenance items, vehicles that are driven under special operating conditions require further maintenance service. These special operating conditions, which put added demands on a vehicle, include:

• Driving on dirt roads or on dusty roads

• Repeated trips of less than five miles in temperatures below 32° F or 0° C

• Extensive idling and/or lowspeed driving for long distances, such as police, taxi or door-todoor delivery use

If you drive primarily under any of the conditions noted, you should replace the engine oil and oil filter every six months or 5,000 miles. Some of these special operating conditions require other maintenance items; these items are indicated in each maintenance chart.