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The oil is dyed blue to make it easier to recognize in the gasoline. It appears black in this bottle because it is not diluted. Two-stroke oil (also referred to as two-cycle oil, 2-cycle oil, 2T oil, or 2-stroke oil) is a special type of motor oil intended for use in crankcase compression two-stroke engines, typical of small gasoline-powered ...
A tube ensures flow of oil from the reservoir to the oil pump. This system is commonly used for motorcycles as it eliminates the need of pre-mixing fuel and two-stroke oil. Vespa is an example where pre-mixing of two-stroke oil is required. Automatic lubrication was introduced for motorcycles by Velocette in 1913. [1]
In small two-stroke engines, the oil may be pre-mixed with the gasoline or fuel, often in a rich gasoline: oil ratio of 25:1, 40:1 or 50:1, and burned in use along with the gasoline. Larger two-stroke engines used in boats and motorcycles may have a more economical oil injection system rather than oil pre-mixed into the gasoline.
246cc (15.1 cu. in.) Bore and Stroke: 66 X 72 mm (2.60 X 2.83 in) Iron Liner 66 X 72 mm (2.60 X 2.83 in) Iron Liner Compression Ratio: 7.5:1 7.7:1 Engine Dry Weight: 26.0 kg, 57.3 lbs 26.0 kg, 57.3 lbs Lubrication: Two-stroke oil/fuel Pre-mix Two-stroke oil/fuel Pre-mix Carburetion: Keihin 34mm PJ05A Keihin 34mm PJ07B Starting: Forward Kick ...
Crankcase lubrication is achieved in two-stroke GDI engines by injecting oil into the crankcase, resulting in a lower oil consumption than the older method of injecting oil mixed with fuel into the crankcase. [67] Two types of GDI are used in two-strokes: low-pressure air-assisted, and high-pressure.
Lubrication is accomplished by adding two-stroke oil to the fuel in small ratios. Petroil refers to the mix of gasoline with the aforesaid oil. This kind of 2-stroke engine has a lower efficiency than comparable 4-strokes engines and releases more polluting exhaust gases for the following conditions: