Since the merger of Phillips 66 and Conoco they have brought a new oil to the market made to address the needs of engines equipped with exhaust valves. More info here:http://seweb1.phillips66.com/Luhttp://seweb1.phillips66.com/Lube/PRODUCTS.NSF/Products/5DFDDC0DFE81A51F86256BD8006AE839?OpenDocumentbe/PRODUCTS.NSF/Products/5DFDDC0DFE81A51F86256BD8006AE839?OpenDocument