My 2008 Camry uses 1/4 to 1/2 quart of oil per month.
Toyota is aware of this widespread problem but has not issued a recall or set up a customer support program.
Had this started during the first 5 years, there was a TBS (or something like that), but mine didn't start until around 60,000 miles last year, which seems to be the mileage at which this problem starts.
I bought this car new - it had 6 miles on it, and all oil changes have been done.
If the rings and pistons need to be replaced, which is the one solution the dealer came up with, the cost will be $3800.