Ouch
I posted about the two oils because earlier others posted about using one of them, Rotella T 15W40, for the Zinc levels. The racing oil has more. I did not say go out and use this oil. I posted about what I discovered and put forward some doubts based on that information. Doubts translate into question which should result in discussion.
Are the oils sold by briggs or kohler designed for todays engines or the decades old engines in our old cubs. Or are they more about keeping the EPA happy. It seems fair to look around and see if we can do better which should always be the case.
Iff $4 an oil change would do a better job of protecting the small engines I care for most I would use it in a heartbeat!