Bosch L3421 Long Life Oil Filter Engineered and designed to trap and hold contaminants up to 10000 miles, to keep the oil clean and protect your engine 4 star filtration has the capacity to hold up to 22 grams of dirt Bosch long life oil filters are 99.5 percent efficient in capturing microscopic pollutants Metal spiral-wound center tube for internal strength and durability while the metal end caps provide integrity to the filter media during cold starts