So today I was at the parts store, and I grabbed a 30001 PureOne Filter (this would be a Ford FL1A large, 302 filter) and was a little surprised that it seemed to be about 1/3 the weight of the Amsoil Eao15 filters that I am used to running. So grabbed a M1 filter, and it seemed to weight about twice what the PureOne did. You can tell a lot of the weight is in the base plate, but I am wondering if that Pureone filter is missing something compared to the others? I've read here about larger filters having less filter material?