Purple Crown is a niche high-end engine oil in the Chinese car owner group, its production of a variety of high-performance engine oil covers almost all consumer and industrial fields, the fully synthetic motor oil product line is also widely used in the United States NASCAR competition, in the Gear4Weels, MCNT, Car Outfitter and other institutions of the evaluation usually ranked second, its quality grade in line with the American Petroleum Institute (API) SJ, GF-2, CF-4, CG-4 and CH-4 standards, quality is at the upper middle level.
 
The Purple Crown filter paper is made of 100% synthetic glass fiber, which is white overall, and other brands of filter paper are usually light yellow. The filter paper theoretically has a filtration effect of 100% for 25 micron particles, but only 99% for ISO 4548-12 testing, failing to surpass Mobil 1, with a filtration effect of 98.7% and 80% above 20 microns and 10 microns respectively, which is outstanding in the industry, so Purple Crown filter is often used in high-performance vehicles together with Purple Crown oil.
 
Purple crown machine filter is full of American rough style, the material is not stingy, the shell uses thickened high-strength steel plate can withstand the impact strength of 6 G, the whole tank can still remain intact at 600psi, the explosion-proof level is 2 times that of the ordinary filter, there is a certain weight, the check valve is made of silicone material, and has passed the 150,000 times continuous start test, the protection performance is very good.
 
Generally speaking, the main feature of the Purple Crown filter is long-term, with a life span of about 8,000-10,000 kilometers. At present, the price of purple crown machine filter ranges from 130-150 yuan according to different models, and there is no sales channel in China, so it is recommended to buy it through overseas shopping.