Baldwin doesn't publish all their information online, if you call or email they will usually get back to you the same day with all the info you could every want. Over all they are very wallet friendly for the most part, the oil filter for a 5.9 Cummins was like 5 bucks a pop for 30 microns absolute, OEM spec was 35 micron absolute. On my current truck, 7.3 PSD, OEM spec is 18 microns abs and Baldwin is like 23 microns. Efficiency wise they seem to float around OEM spec, not much more, not much less.