Tamaroak wrote:
I have been advised by both Cummins and Amsoil, who conspired to
convince me to install an oil bypass filter system to my turbo-diesel.
Cummins thinks I should use their Devac Blue synthetic, I think it's
called, and believes I can go 500 hours on an oil change, although I
doubt if I will go that long. The system has me changing one of the
filters every 100 hours and the other at 200 hours and doing an oil
analysis after every filter change. I will be particularly intereseted
in acid buildup.

This is supposed to filter out all of the littlest particles that will
wear our my motor so it will last forever. I will be using the Amsoil
15-40 Marine Diesel. I'll report back in 20,000 hours.


2 problems with bypass filters- it diverts oil flow that would otherwise
be going thru the system to the bearings that need it... and it doesn't
filter all oil delivered thru the system. So, while your bypass filter
may "remove" little particles, it doesn't prevent other particles from
getting to the bearings.

Instead of a bypass filter, a better full-flow filter is desirable IMHO.
The only problem with them is that they're more expensive and neglect
causes greater engine harm (although if you neglect your bypass filter,
you probably don't give the regular filter exemplary care either).

Fair Skies
Doug King