Engine Burning Oil problems of the 2010 Toyota Prius - part 2

At about 125,000 miles, the engine warned me of low oil. It was the first such warning ever with this vehicle. At that time I could secure only 2 quarts of the required synthetic oil and it was still over 1 quart low. About 500 miles later I took the vehicle to Toyota chula vista and explained. They added 3 more quarts of oil and suggested a series of oil consumption tests. I called Toyota motor USA consumer relations and opened a case indicating that I was consuming (burning not dripping) 1 to 2 quarts per 1,000 miles and my mpg had decreased from 46 avg to 35 avg. The oil consumption over the next 3 months averaged 1 qt/600 miles and my avg mpg deteriorated further to 29 mpg. In July Toyota chula vista performed a teardown and ended up replacing the lower engine, cylinders rings, and valves. I was informed that other 2010 Toyota Prius engines exhibited failure/wear of the cylinder walls at about the same mileage. Field techs were contacted again by the chula vista service mgr and I contacted Toyota national seeking some assistance in the $6,400 repair bill. Both local field rep and national declined those requests. What good is a 10 year hybrid battery with a 3 year engine?.