Originally Posted By: Cujet
The prius already has oil consumption issues upon reaching moderately high miles on uber thin oils. I certainly hope Toyota has addressed the piston ring sealing issues. Thin oils can work exceptionally well in properly designed engines.
Might not be a good choice for high performance engines. I tried using a very thin oil in my Turbo Miata years ago, in an attempt at more HP. I ended up with failed bearings and 250ppm Pb readings.
If the ring tension is increased to stop oil use, won't that simply replace the friction lost by using the thin oil that burns?