From the instalation instructions it says "This filter is pre-oiled and ready for service. To re-service the filter, use a cotton gauze filter cleaning and oil kit normally
found at motorcycle and performance shops."
and then i looked on their website and the oil that jim wolf uses gives a blue tint.
http://www.jimwolftechnology.com/customer_part_detail.asp?PartID=355

i guess its just K&n's oil that is red