anyone been useing the napa 3225 and premixing your gas for awhile? any problems? napa website says not to use this filter with premix but at 12 microns i cant see how it can seperate the oil out- http://www.napaonline.com/Catalog/R...Ntt-Marine/N-4294941076 102008 50195/Ne-50000 last one on that page