The exhaust on the car will blueish grey smoke also as you check the oil regularly watch the levels. or a vast amount of oil dripping out of gasket sites (valve cover,timing cover,oil pan.etc... etc... etc...
you put too much oil in, it is burning the oil.
Yes. Blue.
You can tell this before an oil change. If you see blue smoke coming out the exhaust your engine is burning oil. If you're oil level is low and you have no oil leak your burning oil.
An oil leak is always going to be out of the engine as the engine contains oil and the car does not. I think you are saying you are loosing oil with no apparent leak. If that is the case the engine is burning oil and that is why you see no leaks.
The engine is burning oil
Smoking engines tend to be signs of burning oil. The best solution would be to get your mechanic to see why your oil is being burnt.
You're burning oil.
It is either leaking it out or burning it.
engine burning oil( white or blueish exhaust smoke ), water in oil, oil in water, water in exhaust.
your car has oil burning in the combustion chamber of your engine , need to rectify the engine block and replace piston rings
Could be overheated coolant or just leaked oil burning off your exhaust headers
The engine is burning oil.