What kind of engine oil is used for the DX7?
2 Answers
The original factory-specified engine oil model for the Southeast DX7 is 5W30 fully synthetic oil. Engine oils are divided into three categories, with differences as follows: 1. Mineral oil: A commonly used lubricant in the market. Essentially, it utilizes the inferior components of crude oil. Mineral oil is inexpensive but has a shorter lifespan and inferior lubrication performance compared to synthetic oil, and it also causes greater environmental pollution. Additionally, mineral oil cannot completely remove impurities during the refining process, resulting in a higher pour point, making it unsuitable for use in extreme cold conditions. 2. Semi-synthetic oil: A product refined from mineral oil using hydrocracking technology. It is a mixture of mineral oil and fully synthetic oil in a 4:6 ratio. Semi-synthetic oil's purity is very close to that of fully synthetic oil, but its cost is slightly higher than mineral oil, making it an ideal transitional product from mineral oil to synthetic oil. 3. Fully synthetic oil: Fully synthetic oil is a high-grade oil among engine oils. It is derived from ethylene and propylene dispersed from natural gas or crude oil, which undergo complex chemical reactions like polymerization and catalysis to form a lubricating fluid composed of large molecules. Essentially, it uses the superior components of crude oil, subjected to chemical reactions and controlled to achieve the desired molecular structure. Fully synthetic oil has neatly arranged molecules, strong resistance to external variables, excellent thermal stability, oxidation resistance, and viscosity stability compared to mineral and semi-synthetic oils, but it is also the most expensive.
I have been driving the Soueast DX7 for three years and deeply understand the importance of choosing the right engine oil. Generally, a 5W-30 full synthetic oil is recommended, and the viscosity grade can be found in the vehicle manual—it suits most climates and daily driving. The engine design is quite sensitive, and using the wrong oil can lead to increased wear or higher fuel consumption. Personally, I make it a habit to check the oil every 8,000 kilometers, especially during seasonal changes when temperature fluctuations affect oil quality—winter may require oil with better low-temperature fluidity, while summer calls for higher viscosity. Saving money is fine, but never skimp on quality by buying cheap, inferior oil; trusted brands like Shell or Mobil are reliable. Remember, regular maintenance keeps your car running longer and safer.
