I contacted Wix about the Napa line for my Expedition. I asked them which filter had the highest oil flow rate? 1. 41372 Platinum 2. 1372 Gold 3. 21372 ProSelect The lady told me that the threaded hole diameter is the same so they all have the same flow rate. That doesn't sound right to me. How does one filter list as stopping smaller microns but flow the same? Also the said they couldn't give me the micron rating of the Proselect because it was proprietary. I want the filter that will get oil to the heads the fastest in my truck, which one would that be from the ones listed?