Generac has dropped the "S" on the end of the extended filter, and removed the "30% More Filter" from the actual oil filter. This is due to this now being the standard oil filter on all Generac generators. The filter you will receive is the extended life, 90MM long filter. It is 30% longer than the old filter that used to be standard back in the early 200's. Generac - OIL FILTER 90 LOGO ORNG-CAN - 070185E This is the OEM oil filter that will fit most of the Generac engines used on Generac generators and other manufacturers equipment post 2008. FITS ALL: 10, 12, 13, 15, 16, 17, 18, & 20kW air cooled Generac, Centurion, Siemens, & Eaton standby generators post 2008 FITS ALL: 10 - 17.5 KW Generac XP, XG, & Ultra Source series portable generators Generac no longer uses the term "30% more filter" but the 070185E is the extended filter with 30% more filter than the normal 070185. 070185E oil filter has since been replaced by filter 070185ES. The additional S simply signifies the color is orange! Generac has changed their part number for this filter because of the new color, however the 070185ES and 070185E filters are identical in every other aspect.