Allow me to clarify the statement. Due to the 7500 being such a new model, the dealer could not locate the proper part numbers for the oil filter, or so he stated. He did have some literature on hand, but the filters that the KUBOTA literature suggested was incorrect. Aftera great deal of effort a filter that woruld fit was located, and after speaking with KUBOTA it was confirmed that that filter was indeed the correct one. It was not the KUBOTA brand however. NOW... as for filters, I do not usually give recommendations but being that I own a trucking company and therefore own a fleet of Trucks, and yes Diesel powered trucks. And these trucks are powered by engines that produce up to 500 HP, and replacement costs for just the block alone of a Detroit 60 series is around 10,000.00 if not covered under warranty. I have made it a point to become somewhat of an authority on maintenance requirements for the equipment that I am responsible for. I looked carefully at the requiremtns of the little 21 HP diesel in my Kubota and spoke at length about it with a representative of Mobile oil, and I spoke at length about the filters with Kubota. Believe me when I say, "it's correct", then it is correct. The research has been completed at that stage. I am not only a customer of Kubota, they are a customer of mine. We pick up loads in Suwannee GA and Gainesville GA on a regular basis. I am in constant contact with their people at both plants, people at the floor level on up to management. I even took part in a redesign of packaging at the Gainesville plant after two crates collapsed during a haul. See photo. We are picking up a load bound for New Hampshire and Vermont as I type.