Does an S&B cotton filter come pre-oiled? Support Updated December 28, 2015 15:27 Follow Yes. S&B utilizes robotics to precisely apply the correct amount of oil to your filter before it ships. Learn more about how our filters are made by clicking here. Related articles How much oil should I apply to my filter? Should I purchase a Cleanable (cotton) or a Dry Filter? Are S&B Dry Filters cleanable? Do I have to use an S&B Cleaning and Oiling Kit to service my filter? How often should I service (clean) my filter? Comments 0 comments Please sign in to leave a comment.