Some owners of 2007 Camrys posted that their manuals say 1.1 qt of oil burn per 600 miles can be considered normal. Is it the case?
If so I would think it's excessive. It used to be that 1 qt per 3000 miles was the "acceptable" rule. Many of the newer Toyota/Lexus 3.5L V6 engines have excessive piston-bore clearances they piston-slap when cold, so I wouldn't be surprised of higher oil burn rates in some of these (I4/V6) engines, but 1.1qt/600 miles???
I guess they don't build them like they used to.