I went through a phase of buying the manufacturer's branded own oil filter in the mistaken belief that I was buying something better than any other. For other filters etc I've always just bought whatever the factor was selling. The penny then dropped that the manufacturer's don't actually make their own filters and ever since I've just gone with whatever my local trade factor is selling, as long as it's a brand I know, (Mahle, Mann, Bosch, Crosland, Fram, etc, etc) and never had a problem. My local Factor now stocks NAPA stuff, which is a very big brand in the US. I'll probably end up with one of theirs at some time. I don't like buying this sort of stuff on line from an unknown supplier (although I'd buy from a trusted source like S4p or AutoVaux etc).