sounds like bad valve guides, and/or rings
If engine runs smooth when hot? I don't think it's the guides I would check the valve seals. also need to pull valve covers to make sure oil return holes are open in the heads.
Because 2t burns cleaner than 4t.
You can tell an engine burns oil, when after 3 months the oil is less than half a quart down on the dipstick. This is very common in Dodge, Chrysler and Toyota, because they run at a warmer temperature than other vehicles.
Oil is mixed with Petrol in what is known as a 2 cycle engine. This type of engine has no lubrication built in (as say an oil tank on a 4 cycle engine) so as the fuel/oil mixture burns lubrication is provided to the cylinder.
Because a 2 Cycle Engine burns the oil in the gas, and in a 4 cycle engine, it sits in the oil pan, and it isn't supposed to burn it at all.
If you use a higher weight oil than recommended by the manufacture you may cause premature engine wear caused by oil starvation at startup. Use exactly what the manufacture of your vehicle recommends and nothing else.
You should immediately drain it out. Diesel oil normally has a higher weight than oil made for gasoline engines. Therefore you may have a lack of lubrication, especially at startup. This can cause premature engine wear.
Excess engine wear at startup and at full operating temperature. Use only the weight oil that is recommended by the manufacture.
No, this is far too heavy an oil for this vehicle. This oil will cause hard starting and extreme wear at initial startup. Use exactly what is listed in the owner's manual.
You have bad, dried out valve seals. When the engine is off, the seals dry up and allow oil to leak into the cylinder, which burns off as the somke you see on startup. But when the car warms up, oil gets back into the valve seals and they swell up enough to keep more oil from dripping into the combustion chamber, so the smoke goes away.
White smoke at startup, loss of anti freeze and milky oil indicates to me a bad head gasket.
While the car is parked, the oil in the engine will drain into the oil pan. When the car is started, it is the oil pump's job to feed oil throughout the system. What you describe may be the tappets knocking for lack of oil at startup (word of caution: DO NOT rev the engine). You might want to change the oil and oil filter to see if that will stop the problem, otherwise the oil pump may need replacement.
Burning oil produces blue smoke. Generally, it's best to keep the oil in the crankcase and not add it to the intake as burning oil can damage spark plugs, O2 sensors and catalytic converters. If you're adding the oil to the crankcase but the engine burns the oil, it may be overfilled or you may have an engine or PCV problem.