i have an 02 santa fe with 85,000 miles. I am the orig. owner and have had engine problems the lifters to be specific and i am getting no were with herb chambers or hyundai. They say that it could be because i used an group 7 pn#v4459 oil filter " well my mechanic did" that it doesn't have a valve in it so it could cause prematchure damage to your engine. also they want me to come up with almost 2 years of oil change receipts....i dont know what to do...i know i have a 7 year 100,-000 mile drive train warranty but it doesnt seam like anyone wants to do nething about it. im very unhappy with the service ive been getting.