Put this oil in my Tundra 5W-30 and my wife's Infiniti 5W-20 couple ago and both developed oil leaks within the first month. Drained it out put Mobil 1 back in, I normally run it in everything and my wife's car stopped leaking just a few days later. But' I had to change my valve cover gaskets out on my Tundra to stop my leaks, both sides too btw.
Idk why it made them leak but it sure did and just tightening down did nothing. Also it caused my tractor (Kohler Magnum) to seep oil around the head gasket halfway through the season and I had to change its gasket. Coincidence?
My guess is it turns to water when hot but idk that? Always liked my RK products but I lost big on this deal.. All the oil + my cost/time for gaskets. At least installing the new gaskets was easy for me, harder to do that on the Kohler than on my Tundra..lol.