2010 Lexus RX 350 Owners Manual - Page 657

SPECIAL OPERATING CONDITIONS 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 off-road, on dirt roads or on dusty roads • Towing a trailer, using a car-top carrier or heavy vehicle loading • 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 above, 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. Note: If you drive only occasionally under any of the special operating conditions noted, it is not necessary to change the oil every six months or 5,000 miles or to perform the additional services listed in the charts. This added maintenance is required only if you drive primarily under any of the special operating conditions. Introduction 3