quote:
Originally posted by Steve S:
Why do you want a bypass filter?
Quite possibly because he wants clean oil lubricating his engine at all times, or it could be because he doesn't want abrasive particles floating around in his oil that the full flow filter can't catch. Maybe he doesn't like the expense, and hassle of having to drain and refill 15 qts. of oil at regular OCI's. Those were my reasons for installing a bypass filter.
If you will be installing a bypass system on a 6.0 PSD you are going to have to buy the oil filter replacement cap from Oil Guard so you can get your pressure feed.
The Oil Guard is messy has hades to change out. My Dad has one for now on his truck and I somehow get roped into changing the thing out for him. The Oil Guard element is $13 a pop w/o shipping. It doesn't have the depth media to filter as fine as a bypass filter should. Also, if you ever need to get in contact with someone in tech support there, forget it.
The Amsoil BMK-11 setup is a quality bypass filter. The only down fall is that the replacement spin on element is more pricey than the Oil Guard. You can go a heckuva long time on an element though. If you don't want to have to mess with changing out an element every 3K miles and topping off I would recommend the Amsoil bypass.
The Motor Guard or Frantz bypass uses a tightly wound roll of cellulose (toilet paper). I use Scott 1000 TP (buy it at Wal Mart, Target, etc...) The oil must pass through approximately 4 1/2 inches of depth media. By the time it goes through, the oil is super cleaned.
Oil Guard: Will not super clean like an Amsoil or Motor guard, and is messy to change. Elements are pricey.
Amsoil: Good bypass filter, but the elements are expen$ive......you won't have to change out the elements near as often as TP
Motor Guard: Cleans oil as good or better than the Amsoil. You have to change the roll every 3K miles or so, add another roll of TP (costs me .65 cents per roll) and top off (fresh oil added to the crankcase every 3K keeps add pack replenished, but adds a little more to the expense).
Here is one of my UOA's that had approximately 7k miles on the oil while using a TP bypass system (notice the comments under the evaluation/recommendation section). This is a
link to my Motor Guard install on my 6.0 PSD. Best of luck....