Coolant isn't supposed to be consumed. Ours, and probably every other car made in the past 15+ years have a closed system. There's a pressure release built into the cap but coolant shouldn't leach out of it. It's more likely there's a leak somewhere. If you see coolant leaking out of the overflow bottle your thermostat is stuck closed.
Let me see if I remember everything. Oil can burn and be vaporized. If it's because you have a leaking piston ring it can make it's way into the combustion chamber on the down stroke and be burned. Solid blue smoke on acceleration is a symptom if bad enough. You can also have leaking valve seals. Oil can drip into the cylinder and burn up, also causing blue smoke out the exhaust, but it usually manifests itself as a puff of blue smoke when you punch the gas, at least early on. Drip enough and it will turn solid. When bearings burn up, the oil can vaporize and wind up in the PCV system, then introduced into the intake manifold, then out the exhaust. Since it's already vaporized you probably won't see blue smoke. But eventually you'll hear crankcase noise. And your O2 sensors, cat and turbo won't be happy. Fortunately, the processes usually happen slowly unless you have a catastrophic part failure. Using the proper oil and changing the oil and filter regularly usually is all you need to do.
In prehistoric times I saw where people thought you only needed to add oil, and never change it. Not a pretty sight.
