Kohler 14 050 36-S Extended Life Oil Filter. KOHLER PRO Extended Life Oil Filters offer excellent filtering efficiency to maximize wear protection under extreme operating conditions for extended oil change intervals. The premium 100 per cent synthetic micro-glass media delivers 99 per cent efficiency at 20 microns, one of the best ratings in the market, with nearly double the dirt holding capacity of standard filters. Filtering out particles larger than 20 microns helps to protect against engine wear. The filters feature low restriction to allow oil to flow through more easily during cold-temperature starts.