Toyota said nothing they can do, it will be my expense to repair it.I am having same issue with this engine. 2013 Prius 112,000 miles last oil change was 5,000 miles ago. I had put 1 quart in a week before oil change. It was gone at oil change. Mechanic looked for leaks, but nothing. Toyota needs to address and fix this issue.
I emailed Toyota and will be calling today.
Anyone who gets a positive response let me know.
I am all for a lawsuit to remedy this.