Do they all share the same fuel filters? Do they share the same filter base? I was told at the local Napa auto parts that the secondary filter number is 3148 and they could not locate a filter for the primary. now the 3148 looks just like the primary and secondary filters however Napa tried to sell me a primary filter they said would work the number is a 3147 this filter does not look like the one it is replacing. It does not have the protrusion on one end with the O ring its flat on both ends with cork washers. I don't want to use this one I need some help finding a good place and the right ones to get quality filters please.