manufacturers of engine oil products all use sae specifications. this
is to mainly present a level playing field. when making, buying,
selling, choosing an oil product.
here is a website that explains how/why, buy the material, interesting
read. http://www.sae.org/servlets/productD...D=J2227_200204
here is a website that the first is referring to "manufacturers specs"
omg its a marine company.