MaxiGuard Super Premium motor oil claims to be "SAE 10W-40" engine oil that is "a superior all weather motor oil made from the highest grade petroleum base stocks and designed to provide the finest performance" and "For all foreign and domestic cars." The Petroleum Quality Institute of America's analysis does not support these claims.
The viscosity results show this product is an SAE 10W-20, not a 10W-40. Further, the volatility result does not support the use of "high grade petroleum base stocks." In addition, the metal results show the oil lacks the appropriate levels of anti-wear and detergent additives required for modern engines. The analysis also shows high levels of iron, aluminum, and silicon, which indicates this product, may contain used oil.
In addition, there are concerning labeling issues. The label claims API service SA, SC. These are obsolete Service Categories the API cautions can cause harm to engines built after 1967. The label does not warn consumers of this limited use.
The Petroleum Quality Institute of America is an independent research company whose mission is to serve the consumer of lubricants by testing and reporting on the quality and integrity of lubricants in the marketplace.
For more information visit www.pqiamerica.com.
