The oil consumption problem is not caused by engine abuse. It is caused by gummed up oil rings. You can get 185psi compression right across all 4 cylinders & still burn a half a quart of oil for every tank of gas. Its crazy!
The oil consumption problem on 1ZZ-FE motors is caused by gummed up oil rings. The build up of half burnt oil causes the rings to stick in a contracted position inside thier ring groove on the piston. This causes them not to come in full contact with the piston walls, causing oil to get by them & to burn off. In fact once it starts, the problem makes it self worse.
The solution is to put a specialized solvent designed for this purpose into the oil. The solvent is supposed to disolve the crud that holds the ring in & free it up. If it works, you will be good as new.