well first of all great site and just the info i've been looking for. Now i know the a ph16 and ph8 (fram numbers or the equivlent) commonly my strat with the 2.7 takes a ph16 with Mobil 1 5w30 with either a Mobil 1 or k&n filter and drain every 5000mi. I am interested in switching to a ph8 for the added bit of oil and filtration. while only 1/2 a quart more is it really worth it for the swap? also being as the filter is mounted in a vertical position will i experience any pressure drop due to the oversized capacity of the ph8? not really sure if the switch i worth it just asking for some opinions on the matter.