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.

Capt. Jeff