VI for several monogrades range from 100-110. Is this due to lack of VII, or are they made from low quality base stocks.
It looks like the multi grade HDEO oils should be chosen over monogrades. Are monograde oils kind of an "orphan stepchild" since they aren't normally specced for modern engines? Do they get the dregs of base stocks?
It looks like the multi grade HDEO oils should be chosen over monogrades. Are monograde oils kind of an "orphan stepchild" since they aren't normally specced for modern engines? Do they get the dregs of base stocks?