Long time lurker here. Trying to find a good filter. I use mann/mahle cartridges on my bmw 330. To show what I know, ive been using pure ones in my wife's mazda6 v6. My OCI on that car is 5-7k miles. Im looking for a good mid range filter that would fit the bill. If i get good suggestions, i promise to cut open the pure one that I remove...