This may be a stupid question but I am not very mechanically inclined. I bought a K & N air filter as they were on sale at the local Schucks (I admit I am a sucker for a sale). I know you are supposed to oil them, and it came with a little oil and cleaning kit, but do they come pre-oiled for the first use? In the oiling instructions it says that the filter is white and their oil is dyed red so that you can tell where you oiled it, and my filter is all red. Am I correct in assuming that I only need to oil it after subsequent cleanings?