Purezone oil filters are high-performance filters engineered for use with synthetic oil and provide maximum protection to your vehicle's engine. Purezone oil filters provide good protection to engines using conventional motor oil every day for normal driving conditions such as city and highway travel. Oil filters by Purezone are durable, have high particle size retention, and are engineered for optimum performance up to 15,000Mi/ 24,000km. Purezone oil filters are engineered to be 95% efficient at 29 microns and laboratory tested for performance as per ISO 454812 13 grams dirt.