Using AMSOIL in engines with possible sludge issues
To inform AMSOIL customers that operating conditions of certain engine designs are re- ported to be “abnormal”. According to Consumer Reports, the engines identified in this bulletin appear to be prone to sludge. The use of AMSOIL Synthetic Motor Oils at regular drain intervals established by the vehicle manufacturer will reduce the likelihood of sludge formation, provide the best protection, and insure that the vehicle manufacturer honors your extended warranty.
ISSUES:
The August 2005 issue of Consumer Reports identified engines from four different automobile manufacturers that are candidates for possible sludge problems. To satisfy customers, Audi/Volkswagen, Lexus/Toyota, and Saab have all extended their warranties to 8-years/unlimited mileage. Chrysler/Dodge is the only manufacturer without an extended warranty program and handles claims on a case-by-case basis.
Provisions of the extended engine warranty coverage include changing the oil within the OEM recommended interval and maintaining documentation for proof.
TECHNICAL DISCUSSION:
Sludge formation is caused by the oil being subjected to abnormal operating conditions such as high heat, excessive blow-by gasses, glycol contamination or poor crankcase ventilation to name a few. Sludge formation, if severe enough, can block the oil passages and oil pump pick up screen, resulting in oil starvation.
AMSOIL Synthetic Oils have better oxidation resistance, detergency, and dispersancy than conventional petroleum oils. AMSOIL Synthetic Motor Oils do a better job of resisting sludge. However, they will not stop sludge formation under abnormal engine operating conditions. The use of synthetic oil for the best possible engine protection is endorsed by Consumer Reports.
RECOMMENDATION:
Purchasers of used vehicles listed in Table A should take extra precautions to protect their purchases by reviewing maintenance records or requesting an internal engine inspection prior to purchase. Follow regular OEM recommended drain intervals with the appropriate AMSOIL XL Synthetic Motor Oil for Audi/VW and Saab.
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