Originally Posted By: jrmason
The Donaldson ELF 7349 is the most efficient oil filter available for the 5.9/6.7 Cummins engine. It is rated 100% efficient @ 20um, 99% efficient @ 15um, and 60% @ 7um compared to the Fleetguard LF9028 100% efficiency @ 30um, while the bypass gets approximately 5% of the oil @ 5um @ 95% efficiency.
The Fleetguard is a fine oil filter but considering I can buy 3 Donaldsons for the price of 1 Fleetguard, I'll stick with the Donaldson filter. IMO, the best filtration is achieved with a Donaldson full flow and a single remote bypass filter. I built one for about half the price of the Amsoil bypass systems, except I used the EaBP100 bypass filter as it is the best spin on bypass filter available on the market that I'm aware of.
BTW, the Amsoil EAO-80 full flow oil filter is simply a rebadged Donaldson ELF 7349, and Amsoil rates them for 25k miles (when used in conjunction with a full synthetic oil).
Donaldson must be getting cheaper-I got the LF9028 from filterbarn for $24.80, & the Stratapores to fit the Cummins are $10 or less. Last time I priced an EaBP100 it was $50 or so-and I don't want the oil lines running around my engine. If I ran big mileage it would be a different story.