There are many reasons for that. One of them is bad piston rings or sticky rings (you can use special additives to fix it). Another one is bad valve seals (again special additives can fix it too). In some cases the additives cannot fix such problems you have to replace failed parts.
PS: When you use the additive which changes the oil viscosity make sure that you don't harm the engine (in cold parts of USA oil with high viscosity will damage engines).
No, engine from 97 will not fit 96.
5w30 or 10w30 are the most recommended motor oils for light passenger cars.
Can a put an engine out of a 1996 toyota camry into a 1997 toyota camry?
Will a 95 Camry 2.2 liter California emissions Onegin fit in a 98 Camry?
Either the 2.2 liter - 4 cylinder engine or the 3.0 liter V6 engine
For 97-2001 (4 cylinder) 3.8 qts
You can find it in between the battery and the exhaust system coming out of the engine.
the speedometer on my 97 toyota camary stopped working and the check engine light came on why
Blue smoke is burning oil.Blue smoke is burning oil.
4-cylinder takes 3.8 quarts of 5W-30.
If it's 97-99 model 3.8 quarts.
take your Camry to an Auto Zone parts store, they will hook it up to a diagnostics machine for free. Then you will know what your problem is.