the oils i have always used are golden spectro two cycle, and napa full synth. gear lube. Old Guy is right, there is more marketing than concern for a quality product, but i have been using these two oils for 25 plus years and have NEVER had a faliure that could be related to either. I do not like bad advice, and I do like passing along info that has been reliable to me. a good product cannot be found by claims on the label only in real world results. they work for me.