I have used Kendall for a very long time, it used to be regarded as a top quality oil, but recent changes in multi-weight formulation (no longer green in color, made from different location) leads me to suspect its become a garden variety Conoco/Phillips oil, UOA's on this site have not been stellar, although there are very few. The monograde is still green and still comes from Costa Mesa, Ca. and I suspect it is still a very good oil, I use SAE 40 for my jetboat, although I may be trying DELO or Pennz LL in a SAE 40 HDEO.