Bought a Gravely ZT HD a few weeks ago, with a 22 Kawasaki engine, hopefully the last mower I will ever buy. Question. I have always believed in OEM filters, but I am looking for input from anyone. Should I get the OEM filter for the Kawasaki or a replacement filter of any kind. Being a Toyota vehicle buyer for years, I have always used Toyota filters, they have a check valve which seems to get oil to the top of the motor quicker than most. Just looking for input, I respect everyone's opinion. My Gravely dealer says they have no preference. Thanks in advance for your responses, I will be on the road and won't be able to respond.