09-13-2019, 03:34 AM
No, this is not ( thankfully ) another debate over oil brands, types (dino or synthetic), or viscosities. Our owners manuals call for API classification SG or higher except energy conserving or resource conserving ( those additives are not good for our machines) on the circular API service label, SAE 10W30, Jaso T903 standard MA. I think most, if not all of us understand everything except the Jaso. I have no qualms about admitting Jaso was foreign to me, and decided to find out what it all meant. Fortunately I found a very well written, easy to follow and understand explanation, and have included a link to the article here. The article covers four strokes, and there is a link to part 2 which is 2 strokes. Check it out here:
http://www.mototribology.com/articles/ja...ed-part-1/
http://www.mototribology.com/articles/ja...ed-part-1/