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Subject: TWL: Re: Fuel Polishing
From: Alex Hirsekorn (alexh@XXX.XXX)
Date: Tue Apr 03 2001 - 01:19:41 EDT
Hi Michael,
At the risk of getting bogged down in semantics:
In the context of TWL "Bypass" refers to the very fine filtration of
crankcase oil. The term "Bypass" refers to the fact that only a small
portion of the oil goes through the bypass filter as it circulates through
the engine.
The term "Polishing" refers to the very fine filtration of the diesel fuel
stored in the boats tanks. This process is done with an auxiliary pump if
the engine is not running but it also occurs to one extent or another when
the engine is running since all diesel engines return a portion of the fuel
received back to the tank.
Outside the context of TWL these terms can apply with similar definitions to
a much broader set of applications. For example really huge diesel engines
in ships or stationary installations utilize a system of lube oil polishing
that is similar to the fuel polishing that is discussed on TWL.
To reiterate; Charlie Sims of GCF recommends fuel polishing for recreational
boats but he agrees with me that bypass filtration for a trawler's motor oil
is not economically justified. Charlie and I also agree that ultra clean
motor oil has definite and measurable benefits for engines that are more
heavily used than most recreational boats.
Semantically yours,
Alex
----- Original Message -----
From: "Michael D. Rowe" <Kanani@XXX.XXX>
Are we talking here about bypass systems that operate only when the engine
is running versus independent polishing systems that can be run without the
engine as needed?
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