C calvinnnnnnnnn Joined Feb 27, 2008 Messages 586 Location ca Dec 21, 2009 #1 what does SM SJ SL etc mean?
S shanneba Joined Jul 10, 2004 Messages 1,094 Location Indiana (IN) Dec 21, 2009 #2 They are API oil classifications - you can see them here - http://www.api.org/certifications/engineoil/categories/upload/2009_ENGINE_OIL_GUIDE.pdf
They are API oil classifications - you can see them here - http://www.api.org/certifications/engineoil/categories/upload/2009_ENGINE_OIL_GUIDE.pdf
