I have not personally ran them, but in Vietnam they are pretty popular. At first not so much but compared to my Fusion engines they suck in run time and durability. They get about 8 minutes run time here while I get closer to 10. I had 6 plus gallons when I sent in my psr for pinch I think they average about 5 gallons per engine. In Malaysia they really like them though but... they haven't ran fusion either