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.
Look at the engine on your lawn mower. If the engine has an oil filler tube or a "hole" with a cap on it where oil is added to the engine, it is a 4-cycle (4-stroke) engine. If there is no oil filler tube or place to add oil to the engine, then it is a 2-cycle (2-stroke) engine and the oil has to be added to the fuel.
Only if it is a two-stroke (two-cycle) engine.
Buy a lawn mower engine repair manual at Border's or Barnes & Noble.
If it is a 4 cycle engine, yes, it does need oil. If it is a 2 cycle the oil is mixed with the gasoline.
4
Most lawn mowers have 4-stroke gas engines. Some have 2-cycle, and if you are talking about riding mowers, some even have diesel.
very gently, or the mower will get squashed
no
If you put it in for engine oil you will have a major problem. If you put it in with the fuel then you will notice the mower smoking a lot and possibly fouling the spark plug.
depends on the engine but it will be on the engine block.
Push lawn mowers require regular gasoline like most cars.
The sound of a jet engine vibrates more than the sound of a lawn mower.