Due to the difference in structure and lubrication characteristics of two-stroke and four-stroke engines, the requirements for lubricating performance and the composition of oil are fundamentally different. The two cannot be mixed with each other. If the two-stroke engine uses four-stroke oil, it will cause the following problems:
a. The four-stroke engine oil contains anti-oxidation and anti-corrosion agents such as zinc disulfide zinc phosphate (ZDDP), which is easy to cause spark plug fouling, and forms a precipitate, which causes the electrode parts to be connected to cause a fire breakage.
b. Four-stroke engine oil has a high ash content which causes the engine to pre-ignite and produce a large amount of combustion deposits.
c. Four-stroke single-stage engine oil with high viscosity base oil is easy to produce smoke and sediment, while multi-stage engine oil contains relatively oxidatively stable polymer, plus four-stroke engine oil with high flash point (about 210 °C), making combustion incomplete It eventually leads to severe deposits and clogging of the exhaust. From this point of view, the combustion lubrication of the two-stroke engine is a special and sensitive problem. Its performance includes reducing the oil consumption, improving the combustion of the mixture containing organic oil molecules, and purifying the emissions.
Two-stroke motorcycles are developing in the direction of high power and high speed, and the technical requirements of lubricating oil are also increasing.
Starting from the two-stroke engine oil specifications established by the American Petroleum Institute (API) in 1977, after more than 20 years of development and evolution, the old specifications are almost completely banned (ie, the original two-stroke engine oil standards TSC-1, TSC-2, TSC-3). TSC-4 was banned in 1992. The quality level of today's global two-stroke engine oil has increased rapidly. The Japanese JASO two-stroke oil specification was issued in 1993. The technical indicators include: lubrication index (L1X) and initial torque index ( TLX), Clean Index (DLX), Smoke Index (SLX), Blockage Index (BLX).
China also started to implement JASOFB and FC two-stroke engine oil in 1995. In the process of using the vehicle and maintenance, the majority of users must add high-quality two-stroke special oil according to the relevant provisions of the vehicle manual to avoid the randomness of oil selection and addition, so that your motorcycle can operate normally.