Here's why:
* Separate Lubrication Systems: Four-stroke engines have separate systems for fuel (gasoline) and lubrication (engine oil). The fuel is burned in the combustion chamber, while the oil lubricates moving parts like pistons, connecting rods, and camshafts.
* Oil-Gas Mixtures are Inefficient: Mixing oil and gas would lead to:
* Incomplete Combustion: The oil doesn't burn efficiently, leading to smoke and deposits in the engine.
* Reduced Engine Performance: The mixture would be less efficient than pure gasoline.
* Increased Emissions: The incomplete combustion creates harmful pollutants.
* Engine Damage: The oil can foul spark plugs and clog fuel injectors.
Two-stroke engines are the ones that require pre-mixing oil with gasoline. This is because they use a mixture of oil and gas to lubricate the engine.
Always follow the manufacturer's recommendations for your specific engine model.
