David,
I loved your information about the Mil-Mac bypass filter. What
you say about engine wear really makes sense. You said in a previous email that
it was an Australian product. I'm Australian and I can't locate it. None of
the people that I have spoken to are aware of the Mil-Mac brand. I have
looked on the web and couldn't find a Mil-Mac site. Not in the phone book.
Perhaps they are known here by another name. Can you please give me more
information.
Barryt
[EMAIL PROTECTED]
----- Original Message -----
From: David Reid
To: biofuel@yahoogroups.com
Sent: Saturday, May 19, 2001 12:54 PM
Subject: [biofuel] Why you should fit a MIL
Why you should fit a MIL-MAC in addition to your standard Full Flow Oil Filter
Full Flow Filter MIL-MAC
By-pass Oil Filter
(Uses SURFACE filtration (Uses DEPTH
filtration
Uses perforated membranes which can Universally recognized
as the most
be damaged or clogged up with efficient method.
large particles.
Uses full depth filtration which only
allows thoroughly cleaned oil to
come out the other side.
Membrane only 1/32" (=0.8mm) or less Filter material 4"
(100mm +) or
in thickness.
more in thickness.
130 x more surface filtration.__________
(Uses no additional filtering. (Works in
addition to the standard
factory full flow filter.________________
(Designed to pass all the volume of oil in (Designed to
thoroughly filter only 10%
1 minute or under. volume
in the same time.____________
(Only traps large particles. (Traps all
particles.
(At very best removes particles only (At very best
removes all particles as
as low as 10 micron. (nominal rating) low as 0.1
micron and all above.
(100 times better than any full flow).
(At best removes particles 15 micron (At best removes
the majority of
and above. (nominal rating) particles
between 0.1 and 1 micron
and all above 1 micron.
(150 times at best, to 15 times better ).
(Realistically removes particles 25 (Realistically
removes all particles
micron and above and has difficulty above 1 micron.
(absolute)
removing those under. (Still nominal (still 25 times
better at worst and
rating although a few are absolute). 10 times better
at very worst)._________
(Can become clogged up and fail to (Can also become
clogged up at surface
operate properly if oil is exceptionally if oil is
exceptionally dirty but continues to dirty.
operate as surface contamination is
pushed a small way into the filter and will
normally last its full allotted mileage span
with no difficulty.____________________
(If fully clogged up or in cold weather (If fully clogged
up switches over to full
opens a by-pass valve that allows oil to flow filter so oil
continues to be filtered at
pass on the basis that dirty oil is better all times even
if inefficiently.
than no oil at all. This invariably causes While operational
even if only partially still
damage and can drastically reduce removes all
particles.
normal expected engine
life.___________________________________________________
(Does not remove the vast majority of (Removes all
particles above 1 micron
particles between 5-15 micron which and especially all
those between 5-15
cause the majority of wear in an engine. micron.
(Allows virtually all the particles (Removes all
particles above 1 micron between 5 -15 micron to continue to
generally as quickly as they are created
circulate causing most of the wear and thus eliminating wear
and tear.
tear.
(Gives normal expected life which with (Gives greatly
extended operational life of
planned obsolescence is becoming the engine which
allows it to last the life
shorter and shorter. of the
vehicle and which after all is the
dearest component of the vehicle.______
Residual value of vehicle is normally (At least double
the life guaranteed.
related to condition of motor (If installed
and maintained properly will
give 4 to 5 times the life.______________
(Largely a protective device only today (An old technology
that has not been
which removes large particles and pieces superceded or surpassed
and that has
of metal both of which can cause major stood the test of time
wherever it has been
damage if left
installed and maintained properly.
An inferior design with planned Today better
made with the advances in
obsolescence built in that continues to modern
manufacturing technology.
be used with very slow improvement as it Result: superior
filtration with superior
looks after the interests of engine and engine life.
vehicle manufacturers who want to sell
new engines, vehicles, and spare parts
and oil companies who want to sell
oil.___________________________________________
Oil and filter changes:
(Average life = 6 months or 10,000 km. (Average life =
indefinite (life of vehicle)
filter roll every 5000km
(Oil and Filter change = all of oil (4-5 L av) (Oil and Filter
change = only 1 litre of oil
+expensive filter ($20 +) +
inexpensive filter ($2) =approx.10%
(Average cost = $80- (Average
cost = $5-$8 Max cost = $10
1/15th to 1/10th
ie. 10 to 15 x more oil changes
achievable for the same cost.
(Costs: the maximum for Oil & Filter (Saves 80% on Oil
cost & 90% on Filter_.
Other Factors:
(Uses full pressure at all times which (Uses less
pressure ands drops the
only allows screening to occur but which velocity by means of
a restrictive orifice
can also damage openings in membrane which allows proper and
easy separation
by forcing slightly oversized particles to occur leaving
all contamination and
through the openings continuing to particles behind
permanently.
abrade and open them up wider._______________________________________________
(Leaves particles, sludge, and other (All particles and
contaminants removed
contaminants behind when both oil and with filter when
changed.
filter are changed.___________________________________________________________
(Allows small particles and contaminants (Removes all particles
virtually as they are to continue to circulate.
created leaving oil analytically clean.____
(Adds to the consumption of non renewable (Enviromentally friendly.
resources._________________________________________________________________
(Cannot easily be ascertained if filter is (Can easily be
ascertained that filter is
working properly or if fully operational. If working properly
by placing hand on
filter is hot does not imply it is working. canister after 5
minutes of operation.
If canister is hot filter is working properly._
(When engine is not operational allows dirt, (As all particles and
contaminants are
iron particles, and other contaminants to removed as they are
created and oil
sink and settle in bottom of sump, and to remains analytically
clean there is nothing
coat interior walls and passageways. to
settle).__________________________
(Dirty oil means more wear and less (Clean oil means
less wear and greater
compression, a poorer running engine, compression, a better
running engine, lesser reliability and shorter engine life
greater reliability and longer engine life.
_________________________________________________
(Nominal rating : Manufacturers rating which has no bearing in reality and
can vary from manufacturer to manufacturer being generally grossly overstated.
Generally implies filter can remove some particles or small % down to that
level, certainly not all.
(Absolute rating : Always higher than nominal rating and only one of these
two that has any real meaning. Eg. Nominal ratings of 10 to 15 micron always
mean Absolute of 30 to 40 micron, although this has dropped back a bit with
the latest improvements in filter technology with the better quality dearer
filters, though not as much as manufacturers would have us believe. Filter
removes particles down to the stated level and theoretically all above.
(Beta Ratio tests: A multi-pass test, adapted to lube oil, slowly being
phased in to replace the old unreliable micron tests over the next ten years or
so, and adopted by governing bodies such as SAE, ANSI, NFPA, and the ISO.
Among its advantages as opposed to the deficiencies of micron ratings are the
following:
1) Repeatability.
2) True indicator of filter efficiency because entire filter is tested not
just a sheet of filter material.
3) Test accounts for what happens to a filter over time.
* Studies by Cummins Technical Center (part of Cummins Engine Company Ltd,
the largest truck engine manufacturer in the world() showed that wear can be
reduced by up to 91% as a result of using a bypass filter in combination with
the full flow filter.
The same studies also showed that the older a engine gets the more carbon
must be removed and that this is when the engine needs the added protection the
most. Cummins naturally recommend and advise the fitting of a by-pass filter in
addition to the full flow filter.
(Amongst those truck manufacturers using Cummins engines are Kenworth,
Freightliner, Volvo, Daf, International, Ford, Western Star, ERF, Foden, and
Mack.
NOTE: If a filter is unable to remove solid contaminants below 15 micron, the
particles will form a cluster (agglutinate), become too heavy for suspension
and settle out as sludge and varnish. Unless filtered out right here or
removed immediately by changing the oil full scale wear and tear begins
straight away.
Cummins Statements:
"Maximum engine life is dependent on the proper use of full-flow and by-pass
filters. By-pass filters are specified on all turbocharged engines and
recommended for naturally aspirated engines as well."
" The additive package has no protection from abrasive contaminants. Most of
these contaminants are removed from the oil by the filtration system"
.
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