See also:

Materials Added To Engine Oils
Do not add any supplemental materials, other than leak detection dyes, to your engine oil. Engine oil is an engineered product and its performance may be impaired by supplemental additives. ...

EXTERIOR
At first sight, I thought the 2011 Jeep Grand Cherokee was a Porsche Cayenne. With a second glance, I noticed the distinctive front grille and realized that this was indeed a Grand Cherokee. It ju ...

Extreme Cold Weather (Below –20°F Or –29°C)
To ensure reliable starting at these temperatures, use of an externally powered electric engine block heater (available from your authorized dealer) is recommended. ...