An  engine that  consumes 10 gal/hr  will burn 10,000 gallons
of fuel in  1,000 hours of  work  and  will  have performed an
average of 4 oil changes every 250 hours.

An ISO 22/21/18 diesel contains 473 grams in 10,000 gallons
of   volume, therefore 118.25  grams  were combusted  every
250  hours   or  oil  change  interval,   with  1.5  grams  being
enough  to contaminate  10  gallons  of  oil   to increase  fuel
consumption  over  the 3% and cause  premature wear  and
loss of compression.

This  same  engine, consuming  11/8/3  fuel, will  burn  less
than 0.06 grams every 250 hours/oil change interval.

The extension of the useful life of the oil is the consequence
of the extension of the useful life of the engine.

Defining the Wear 

In practice, most aim to simply keep the metal
content  below  a  certain  preset  number  of
ppm.......and they are wrong!!

For example, many OEMs  accept  80ppm of
iron in the oil as a maximum, so an oil sample
taken.  250  hrs   after   the  last   oil  change,
containing 70ppm of iron,  would  give us the
impression  that  wear  is  within  parameters,
while  a  sample  taken   at  500hrs,  with  a
content  of  90ppm of iron,  would make us
think that the wear is above the allowed limit.

But,  if  you  look  at  the  calculations in  the
attached  table, at  250hrs  you  are  actually
going to have more wear than at 500hrs.

Wear Rate

Following  the  most common of  premises...... If
there is more than 80ppm of iron, it is necessary
to reduce the oil change intervals.

Now let's think about this as we look at the table:

250hrs = 70ppm vs 500hrs = 90ppm

Logic may be telling you that at 250hrs  the wear
is less than at 500hrs, when in fact at 500hrs you
are getting better lubrication.

We agree that there is no need to exceed 80ppm
iron content before an oil change, but in this case,
the important point is not to assume that having
less than 80ppm will  make  the engine in  better
condition.

ISO Table:  Life Extension

The following table shows us  the extension of
 the useful life  of  the components, equipment
and   even  the  fluid   itself,   based  on   the
 improvement  of  the  ISO 4406  cleanliness
codes.

The  large  lubricant  manufacturers  reiterate
their support  for  the benefits   of   improving.
 fluid cleanliness.

The  sentencing  limits  for  a diesel  engine is
17/16/13 and for a hydraulic system 15/14/10.

Always  Predictive,  Never Corrective

It may seem that performing oil changes within the times established by the OEMs will keep our engine within  parameters  and  in  excellent condition.

OEMs recognize that the maximum ISO4406:99 for an engine is 17/15/12.

Carrying  out  an  oil  change above the ISO 17/15/12 code  will  generate
impacts: economic, technical and environmental.

It's a FACT, clean engines consume up to 3% less fuel.

Loss of Compression; the Biggest Loss

When an engine has increased wear / high ISO codes, the most relevant
impact is loss of compression which means loss of power and increase
in fuel consumption. 

This  is  the normal  transition  between a  new and used engine,  to the
point of needing repair due to loss of compression.

By keeping the compression in good condition, you SAVE FUEL.

Lower Fuel Consumption

It is known that a clean engine (ISO 17/15/12), is exposed to less friction
and therefore there is less power loss, resulting in less fuel consumption.

A clean oil is always a great benefit for the equipment, its components,
the same fluid and the performance.