Diesters have long been phased out and have been widely replaced by polyolesters.

Recently, many car owners have inquired why we don't use cheaper diester oil.

DLE will never compromise on quality to please car owners, as we are concerned about potential engine problems.

DLE has insisted on using neopentyl polyolester for over ten years.

It has requested a German oil factory to develop this product and, in doing so, helped the German oil factory become globally recognized.

This is because neopentyl polyolester is universally acknowledged as the best aviation base oil. 

However, the technical barriers for research and development are very high, and the costs of development and end-user sales are also high, which is why no oil factory is willing to invest large amounts of money in R&D and mass production.

This is also why DLE insists on using neopentyl polyolester, such a high-quality base oil, to provide the best products for its customers.

Only polyolesters and neopentyl polyolesters can effectively protect (resisting high temperatures, extending the life of internal engine components, and enhancing engine power).

Diester's heat resistance is not as high as polyolester's. (Diester breaks down at around 280°C, while polyolester breaks down at around 320°C-340°C.)

This is why most of the aviation industry today uses polyolester instead of diester.

Neopentyl polyolester is the only base oil that can provide the thermal stability, oxidation stability, lubricity, cleanliness, and low-temperature performance needed for jet engine lubrication.

Worldwide, only two oil factories, NYCO in France and Mobil in the United States, have publicly available data on neopentyl polyolester as a base oil for aviation.

Likewise, this technology has been applied in the automotive industry. 

A German oil factory uses neopentyl polyolester technology in racing cars.

The German oil factory's GT3 racing team has won several championships in the 24-hour endurance races at Nürburgring and Spa.

Long races like these highlight the importance of oil quality.

Additionally, F1 and WRC off-road rally races also use neopentyl polyolester.