Toyota Repair Problems? Ask a Mechanic for Answers ASAP
Thank you for allowing me to help you with this concern today and am sorry to hear that this is happening. I will have to ask you a few questions so that I can get a better understanding as to what may be going on with your Celica.
If you don't see any oil leaks on the outside then the missing oil is Leaking internally. (or someones is stealing/draining it out)
Have you checked the coolant to see if any oil has made its way into the cooling system?
Yes, please get back with me. If there is no oil in the coolant and it's not leaking outside through engine seals, (again assuming someone isn't stealing it) then the only other place it can go is by being burned.