Because 2t burns cleaner than 4t.
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.
The engine's dipstick will indicate the correct or incorrect level of oil within the engine .
Oil is coming out of the tub but what is that a sign of
Look on the oil container and the engine that you want to use it in. The engine will tell you what ratio to mix the oil and gas at. The container of oil will tell you what amount of gas should be mixed with it. I have found that the best way is to put the oil into an approved gas can and then add the gas to it. This helps to mix the oil better.
I can tell you what happens because I have done this. It smokes and burns!
A gas only engine has a spout where oil is added to the engine. If there is no spout, then it is a gas/oil engine. FYI - gas only engine is a four-stroke (four-cycle) engine and the gas/oil engine is two-stroke (two-cycle).
The engine oil capacity for a 1996 Ford Bronco 351 engine is ( 6 quarts with filter change )
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.
An internal combustion engine burns fuel inside.
Internally, then it burns in the engine. More likely with a high mileage vehicle.