Y does the the corolla 2003 always shorts oil after 2weeks does it mean that my engine is week

A normally running engine/car should not be using any noticeable quantity of oil in 2 weeks. So you have some condition that is either consuming oil or a leak (external or internal) to the engine. Look for external leaks. Spots on your driveway? Look for signs of recent oil leakage on your engine. That may be difficult if there is a lot of dirt/old oil on your engine. Check your coolant for oil. Someone already asked about smoke. Look for blue smoke, which is oil consumption. Your car may be putting out white or black/grey smoke but that is due to other issues. In most cases the source of the oil disappearance will not go away but will get only worse. We would be happy to do a free visual inspection and let you know what we find. Good luck with it, Honest-1 Ormond Beach.