Grand Cherokee 2WD V6-3.7L (2008)
Standard engine oil identification notations have been adopted to aid in the proper selection of engine oil. The identifying notations are located on the
front label of engine oil plastic bottles and the top of engine oil cans.
This symbol means that the oil has been certified by the American Petroleum Institute (API). Chrysler only recommends API Certified engine oils. Use
Mopar(R) engine oil or equivalent.
SYNTHETIC ENGINE OILS
There are a number of engine oils being promoted as either synthetic or semi-synthetic. If you chose to use such a product, use only those oils that meet
the American Petroleum Institute (API) and SAE viscosity standard. Follow the service schedule that describes your driving type.
ENGINE OIL ADDITIVES/SUPPLEMENTS
The manufacturer does not recommend the addition of any engine oil additives/supplements to the specified engine oil. Engine oil
additives/supplements should not be used to enhance engine oil performance. Engine oil additives/supplements should not be used to extend engine oil
change intervals. No additive is known to be safe for engine durability and can degrade emission components. Additives can contain undesirable
materials that harm the long term durability of engines by:
-
Doubling the level of phosphorus in the engine oil. The ILSAC (International Lubricant Standard Approval Committee) GF-2 and GF-3 standards
require that engine oil contain no more than 0.10% phosphorus to protect the vehicles emissions performance. Addition of engine oil
additives/supplements can poison, from the added sulfur and phosphorus, catalysts and hinder efforts to guarantee emissions performance to
80,000 miles.
-
Altering the viscosity characteristics of the engine oil so that it no longer meets the requirements of the specified viscosity grade.
-
Creating potential for an undesirable additive compatibility interaction in the engine crankcase. Generally it is not desirable to mix additive
packages from different suppliers in the crankcase; there have been reports of low temperature engine failures caused by additive package
incompatibility with such mixtures.
