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Hold your horse here partner. SE, SF, etc were all acceptable grades of oil when they were first manufactured or refined. As the chemical process and refining processes improved the auto manufacturers demanded a better and better oil. Thus, oils used to be SC and SD, etc. KMart oil and Penzoil all share the same grade. That is, they meet the same MINIMUM requirement to be an SF oil.
Location: I may be getting old but I refuse to grow up
Quote:
Originally Posted by GaryS
Hold your horse here partner. SE, SF, etc were all acceptable grades of oil when they were first manufactured or refined. As the chemical process and refining processes improved the auto manufacturers demanded a better and better oil. Thus, oils used to be SC and SD, etc. KMart oil and Penzoil all share the same grade. That is, they meet the same MINIMUM requirement to be an SF oil.
Gary
Gary
my comments are from tearing down engines in the 70's that were sooooooo crudded up from cheap oils the the pushrods wouldn't move.
Besides why would anyone want to save less than $2 on an oil change buying cheap oil?
Corvette Store
oil grade SE or SF class , what is it ?
That cheap crap is the worst thing you can use
