Before one can properly select a lubricant for a specific application
Effective air filtration is one of the most important
aspects of reducing engine wear. Dust particulates are
extremely abrasive and when these particulates are not
effectively stopped by the air filter, accelerated rates of
engine wear can occur, or in extreme cases immediate
internal engine damage can occur.
Dust particles are classified into four major groups
according to its particle diameter:
- "fine" dust with particles from 1 to 5 microns
- "medium" dust with particles from 5 to 10 microns
- "coarse" dust" with particles from 10 to 50 microns
- "sand" dust with particles from 50 to 250 microns.
To put this all in perspective, a grain of salt has a
particle size of approximately 100 microns (0.1mm) and an
average human hair has a particle size of approximately 90
microns (0.09mm).
They type and size of dust particulates present in the air
depends on which area of the country or world you are in as
well as the type of roads you are traveling on and the
vehicles ahead of your vehicle which can kick up a lot more
dust than normally present. It has been determined that
dust particulates present in average air samples is composed
of at least 70% silica. Automotive engines should be able to
operate effectively in dust-polluted air up to a maximum
concentration of 2.5 g/cu meter. Filters on assault tanks or
tractors should be able to operate effectively during a long
space of time at concentrations between 4 and 8 g/cu meter.
In the automotive testing business I am involved with some
of the most severe engine dust ingestion testing is
performed in Arizona using roads specially prepared with a
specific particle size of Arizona test dust and dirt
particulates and small pebbles and stones. A vehicle will
drive ahead of the test vehicle dragging a special
apparatus, which creates an extremely large cloud of dust
that the test vehicle drives in. This test is used to
evaluate many different parameters from engine wear, air
filtration effectiveness, paint chip protection, stone
pecking and functionality of underbody parts such as brake
and fuel lines and many other parts.
Testing has indicated that piston rings and cylinders are
more sensitive than other engine parts to dust ingestion.
Maximum wear in the upper cylinder parts appears to occur
with particles between 5 and 10 microns. This does not mean
that it is not important to stop both smaller and larger
dust particles. All sizes of dust particles commonly
prevalent in the air on the roads we drive on have the
potential to cause varying degrees of engine wear and must
be stopped from passing through the air filter and entering
the engine.
It is extremely important to make sure you that you use a
quality air filter and that it is properly installed and
sealed at the sides so that dust particles can get past
unfiltered. The air filter must be able to both flow
sufficient quantities of air for proper engine performance
while also stopping damaging dirt and dust particles. A
quality paper air filter is effective in stopping most of
the dust particles; however there are superior filters on
the market with will do a much better job.
Most recently the very latest technology to be introduced is
called Nanofiber technology which has been used exclusively
in heavy duty applications, including the U.S. Army Abrams
M1 tank. AMSOIL INC. has brought this technology to the
auto/light truck market, called Ea Air Filters ( EaA) which
are guaranteed for 4 years/100,000 miles. The nanofiber
technology used in the Ea Air Filters surpasses all other
technology in efficiency, capacity and service life and is
documented by independent laboratory testing performed per
ASTM and ISO standards. With Ea Air Filters, dust and
submicron particles remain on the surface and are trapped in
the nanofibers, preventing particles from lodging in the
filter media depth. This produces higher efficiency and
higher capacity which extends engine and filter life and
reduces engine wear. The Ea Air Filters holds up to 5 times
more contaminants than cellulose air filters and 15 times
more contaminants than a wet gauze type filter.