Performs at 96.2% efficiency in the single-pass efficiency testsUniquely formulated for top-rated efficiency for the life of the filterHas a thick, multi-fiber media and provides a maze to trap contaminants effectivelyHas a grip with a rough textured surface that stays in your hand no matter how oily things getFits a variety of popular lawnmower and tractor enginesOil that lubricates and cools the engine is picked up by the engine's oil pump, cleaned by the oil filter, and reused. It is vital that any dirt or contamination picked up by the circulating oil be removed before it is pumped back into the engine.