What kind of engine? lawnmower, car.
The best way to know if an engine is 2-stroke or 4-stroke, is to look for an oil spout. If the engine has an oil spout where oil has to be poured into, it is a 4-stroke. If the engine has no oil spout and the oil has to be added to the fuel, then it is a 2-stroke.
It is possible to use 4-stroke oil in a 2-stroke engine in an emergency situation. You should not use this oil in the long term as it will damage the engine.
If it is a 2 stroke use 80/90. Weight gear oil. If its 4 stroke run what specified on the engine
It depends if it is a 2 stroke or a 4 stroke. A 2 stroke engine, you mix the gas and oil. A 4 stroke engine, there are separate tanks for the oil and gas.
Use 4 cycle oil if the engine is a 4 cycle engine. Use 2 cycle if it is a 2 cycle. Use the weight oil recommended by the manufacture of your ATV.
No you can not.
If it is a 2-stroke engine, 2-cycle engine oil is added to the gasoline. If the engine is 4-stroke, regular 30W motor oil is used. To tell if your engine is 2-stroke or 4-stroke, look for a spout where oil is poured into the engine. If there is no spout, then the engine is 2-stroke and 2-cycle oil must be added to the gasoline.
Drain it out and replace with proper oil
With a 2 stroke engine, you mix the oil with the gas. With a 4 stroke engine, there are separate tanks for the oil, and the gas.
Absolutely not. Use only 4 cycle oil in a 4 stroke engine. 2 stroke oil is formulated to be mixed with gasoline and will not protect a 4 cycle engine.
Oil is a lubricant. 2 stroke oil is designed to be mixed with gasoline and in that form it lubricates the engine. 4 stroke oil lubricates the engine but is not burned as 2 stroke oil is. This has nothing to do with speed. So, the answer to your question is neither is faster as they are just lubricants.
Because 2t burns cleaner than 4t.