2010 Jeep Wrangler Owner's Manual - Page 463

462 MAINTAINING YOUR VEHICLE Engine Oil Viscosity (SAE Grade) SAE 5W-20 engine oil is recommended for all operating temperatures. This engine oil improves low temperature starting and vehicle fuel economy. Materials Added to Engine Oils The manufacturer strongly recommends against the addition of any additives (other than leak detection dyes) to engine oil. Engine oil is an engineered product and its performance may be impaired by supplemental The engine oil filler cap also shows the recommended additives. engine oil viscosity for your engine. For information on engine oil filler cap location, refer to "Engine Compart- Disposing of Used Engine Oil and Oil Filters ment" in "Maintaining Your Vehicle" for further informa- Care should be taken in disposing of used engine oil and oil filters from your vehicle. Used oil and oil filters, tion. indiscriminately discarded, can present a problem to the Lubricants which do not have both, the engine oil certienvironment. Contact your authorized dealer, service fication mark and the correct SAE viscosity grade numstation, or governmental agency for advice on how and ber, should not be used. where used oil and oil filters can be safely discarded in Synthetic Engine Oils your area. Synthetic engine oils can be used if the recommended oil Engine Oil Filter quality requirements are met, and the recommended The engine oil filter should be replaced with a new filter maintenance intervals for oil and filter changes are at every engine oil change. followed.