This is a quote from Walmart reviews and its for a different filter model I must admit.
"First let me start by saying, I'm not a Walmart hater. I think Walmart does a good job of providing quality products at affordable costs. This review is not critical of Walmart, but a warning that something is wrong with the ST0018 oil filter. I changed my oil today with a ST0018 filter I purchased 6 weeks ago. The oil change had 4600 miles on it and was 5W-30 Full Syn. The paper element has disintegrated and put paper fibers in my oil. With some fibers missing, I'm sure the oil over the last 6 weeks has not been filtered as well. Please contact the factory. The oil filters in production now are defective. I also noticed the filter media has changed. The oil media was yellow and made from stiff paper. The new media is white and fuzzy. So, someone changed the media and it is not working. If a Walmart Rep reads this, please contact me, I will be happy to give you all of the info you need for the factory. Paper filter media in the oil can clog the oil ring on you engine's pistons and cause you engine. $7,000.00 for a new one. This is an important message please take it as so."