l39parts(at)hotmail.com
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 Posted: Mon Mar 07, 2011 12:03 pm Post subject: "more efficient engine designs of the past two decades" |
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I'm curious where you live. Here on earth there haven't been any piston aircraft engines designed in the past two decades.
> Subject: Re: EAA on Marvel Mystery Oil - You're gonna love it.
| Quote: | From: hdinamic(at)qwest.net
Date: Thu, 24 Feb 2011 11:01:49 -0800
To: yak-list(at)matronics.com
--> Yak-List message posted by: "Dale" <hdinamic(at)qwest.net>
MMO used to remove cardon or keep valves from sticking in radial engins.
IS used by many commercial air cargo operators with great success world wide. I personally know air cargo maintenance personnel with actual historical records to show this keeps valves in large radial engines from sticking no other claims were made by them.
Detergents And Solvents
Many of the older, better-known oil treatments on the market do
not make claims nearly so lavish as the new upstarts. Old standbys
like Bardahl, Rislone and Marvel Mystery Oil, instead offer things
like "quieter lifters," "reduced oil burning" and a "cleaner
engine."
Most of these products are made up of solvents and detergents
designed to dissolve sludge and carbon deposits inside your engine so
they can be flushed or burned out. Wynn's Friction Proofing Oil, for
example, is 83 percent kerosene. Other brands use naphthalene,
xylene, acetone and isopropanol. Usually, these ingredients will be
found in a base of standard mineral oil.
In general, these products are designed to do just the opposite
of what the PTFE and zinc phosphate additives claim to do. Instead of
leaving behind a "coating" or a "plating" on your engine surfaces,
they are designed to strip away such things.
All of these products will strip sludge and deposits out and
clean up your engine, particularly if it is an older, abused one. The
problem is, unless you have some way of determining just how much is
needed to remove your deposits without going any further, such
solvents also can strip away the boundary lubrication layer provided
by your oil. Overuse of solvents is an easy trap to fall into, and
one which can promote harmful metal-to-metal contact within your
engine.
As a general rule of thumb these products had their place and
were at least moderately useful on older automobile and motorcycle
engines of the Fifties and Sixties, but are basically unneeded on the
more efficient engine designs of the past two decades.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=332026#332026
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