WIX XD (Extended Drain) oil filters are engineered to reduce downtime by allowing the fleets to extend the oil change intervals significantly when combined with proper oil analysis. It helps to increase the miles driven between oil changes by up to 50 percent. This can lead to increased savings on oil, filters, disposal, and maintenance costs that can add to the profitability of your fleet. WIX XD oil filter lasts longer, runs cleaner, and is more efficient than the competition in both the sludge and the multi-pass tests and traps up to 50 percent more contaminants. WIX XD oil filters feature patent-pending ?Spin Flow Technology? designed to increase filter life. The angled fins are placed where the oil enters the filter to direct heavy particles to the coarse filtration element in order to remove them from the oil. This allows the XD multi?density wire back media in the fine filtration element to trap finer particles and last longer. The XD high-strength media traps the larger particles and media clogging sludge.