Posted by tfringo on August 24, 2007 at 08:32:21 from (207.200.116.7):
In Reply to: Low ash oil posted by ggg7lazy77 on August 23, 2007 at 11:32:07:
In my humble opinion. The best oil that I can find these days is Shell Rotella synthetic 5W-40. It is a heavy duty motor oil intended for diesel engines but can also be used in gas engines. It has a API rating of CL-4 or Cl-4 plus. It has a higher detergent package than many standard motor oils and it has a better wear package than standard automobile motor oils. The key ingredient for the wear package is ZDDP which is being phased out of automobile motor oils for emissions reasons but is critical in older engines for valve wear and general overall design. Also critical is the oils ability to control the Ph in the oil. A good motor oil will do this better than most. 5W will give you flow at low temperatures and at start up (the most critical time to have flowability). The 40W will give you the viscosity you need at operating temperature with an engine that has larger clearances. The ZDDP and the flowability make this motor oil a clear winner in my humble opinion. Most motor oils are coming from the same source, it is the wear and oxidation/detergent packages that are added to them that make them perform. JMHO, Terry
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