After 409,000 miles without
an oil change, the AMSOIL-protected Mack E7-400 engine in this truck was as wear-free as
an engine in comparable service treated to TWENTY TIMES the oil changes.
COLONIAL HEIGHTS, VIRGINIA – “I
didn’t see any surprises in there at all. Based on my experience with AMSOIL Motor
Oil, it came out the way we expected,” said owner/ operator Haywood Gray (right) of
his 1990 Mack E7-400 engine. It came out in good shape, exactly what you’d expect for
a well-maintained engine with 630,000 miles. Yet the engine’s oil had not been
changed for 409,000 miles!
Gray began using AMSOIL Synthetic Heavy-Duty Diesel and
Marine 15W-40 Motor Oil (AME) in the E9-400 V-8 engine of his first truck, a 1984 Mack,
after the engine accumulated 45,000 miles. For 280,000 miles, Gray changed his oil at
40,000-to 60,000-mile intervals though his oil analysis reports showed, without exception,
that the oil was good for continued use. At 325,000 miles, Gray increased his oil drain
interval to 100,000 miles. The engine was torn down at 600,000 miles when Gray decided to
sell the truck. The cylinder liners, bearings, pistons, rings and oil pump, all treated to
extended oil drain intervals with AMSOIL, were found to be in excellent condition. Gray
continued using AMSOIL AME in the engine of his new truck, a 1990 Mack with a E7-400
engine. With the new truck, instead of using 100,000 mile drain intervals, Gray began
basing his oil drains on the findings of a used oil analysis program. He also installed an
AMSOIL By-Pass Oil Filter. After 630,000 miles total and 409,000 miles without an oil
change, the E7-400 engine was torn down by the local Mack dealership in December 1996 and
its parts were examined by an engine rater from a major oil additive manufacturer.
Findings
The engine showed light to moderate wear throughout, just as an engine in similar service
and lubricated with conventional oil changed at 15,000- to 20,000-mile intervals would
show. In fact, according to the engine rater the parts he examined – cylinder liners,
pistons, rings, bearings, valve train components – could have been put right back in
the engine and would have continued to provide the good, dependable service they had
provided all along – after 409,000 miles without an oil change!
Discussion
Many factors enable AMSOIL to be safely used 20 times longer than petroleum oils may be
used:
Stability – AMSOIL Synthetic Heavy-Duty Diesel
and Marine 15W-40 Motor Oil is far less prone to thermal and oxidative breakdown than are
petroleum oils. Stability inhibits the formation of carbon deposits, varnish, sludge and
acids, which helps the engine run clean and protected.
Neutralization ability – While rapid TBN loss
often renders conventional oils unfit for continued use, 12 Total Base Number (TBN) AMSOIL
Synthetic Heavy-Duty Diesel and Marine15W-40 Motor Oil offers lasting protection against
engine corrosion.
Viscosity retention – Some conventional oils’
viscosity slips out of specification within a few thousand miles of an oil change. AMSOIL
Synthetic Heavy-Duty Diesel and Marine 15W-40 Motor Oil neither loses viscosity as
shear-prone oils do, which promotes wear during high temperature operations, nor gains
viscosity as oxidation-prone oils do, which promotes wear during startup and cold
temperature operations.
“The pins show no wear at
all. The piston crowns and lands show a normal amount of carbon. The skirts are very clean
with a few fine vertical lines.”
– Independent engine rater
“The rings are very, very
good. All the rings are free. None are broken. No plugging whatsoever in the oil rings.”
– Independent engine rater
“Probably 95 percent of
the crosshatching is still in the liners. No scuffing, no cavitation in the liners. The
liners could go back in the condition they’re in.”
– Independent engine rater
Additional Demonstrations
Gray’s successful use of AMSOIL synthetic motor oil in extended drain service is not
unique. AMSOIL has conducted demonstrations with fleets all over North America. In each
instance AMSOIL has been proven safe and effective in extended drain use. In fact, these
studies show that AMSOIL used in extended drain interval programs consistently delivers
lower rates of engine wear than conventional oils used in conventional drain interval
programs.
The rater found the valve train components showed,
“very light wear. Very good. [I] find no wear on the shaft, which can be a heavily
loaded area.”
Southern over-the-road fleet – AMSOIL was used
in Cummins class 8 engines for 75,000-mile drain intervals; the fleet’s normal drain
intervals were 15,000 miles.
Upper midwest grocery fleet – AMSOIL was used
in Cummins NTC 350 engines for 74,000-mile drain intervals; normal drain intervals were
12,000 miles.
Northern grocery fleet – AMSOIL was used in
Detroit Diesel Series 60 engines for 79,000-mile drain intervals; normal drain intervals
were 20,000 miles.
Virginia Beach, Virginia owner/operator –
AMSOIL was used in Cummins 350 engine for 325,350 miles without a drain.
Midwestern trucking fleet – AMSOIL was used in
Detroit Diesel Series 60 engines for 60,000-mile drain intervals; normal drain intervals
were 20,000 miles.
Northern tier over-the-road fleet – In an
ongoing demonstration, AMSOIL Series 3000 5W-30 is being used in a fleet of Cummins N-14
engines for extended drain service with oil drains based on the findings of used oil
analysis. One change was performed at one year with 125,000 miles on the AMSOIL. The oil
was recommended for continued use. Normal oil drains are done at 20,000 miles.
“Again,
very, very light wear. These could be put right back in and used again. In an extended
drain program [with petroleum oil] there’s a possibility you could see maybe half
again as much wear.”
– Independent engine rater
“Light wear. They
compare to [those in] an engine that had 15,000- to 20,000-mile [petroleum] oil and filter
changes.”
– Independent engine
rater
“Minimal wear.
These, too, compare to [those in] an engine that had 15,000- to 20,000-mile [petroleum]
oil and filter changes.”
–
Independent engine rater
Except for normal top polishing on the push tubes the rater found,
“no wear to speak of. These can go right back in the engine and be used again.”
The push tubes were put back into the engine and are in use today.
“I see no reason why it [the engine] couldn’t run on.”
– Independent engine rater
AMSOIL Director of Technical Sales Dave
Anderson (left) and independent engine rater Dick Maltby.
WHAT MAKES AMSOIL SO GOOD?
“Synthetic basestocks, top-quality additives, and most importantly, more experience
formulating synthetic motor oils than any other oil company,” says AMSOIL Director of
Technical Sales Dave Anderson.
“AMSOIL first put a long-drain
synthetic diesel oil on the market in 1975 and since then has introduced three other
long-drain synthetic diesel oils.”
DOES AMSOIL OFFER A WARRANTY?
“Yes. AMSOIL warrants that the use of its lubricants will not cause mechanical damage
to any mechanically sound equipment when AMSOIL products are used in full compliance with
AMSOIL recommendations.
“AMSOIL extended drain interval
recommendations are set at a minimum of two times or more than the engine manufacturer’s
recommendations as determined by oil analysis. Diesel operators who use AMSOIL for
extended drains are fully protected.
“Studies have proven time and again
that extended drain intervals with AMSOIL are a win/win situation – truckers win with
less downtime and oil expense and they win big with reduced engine wear.”
AMSOIL Synthetic Heavy-Duty Diesel and
Marine 15W-40 Motor Oil Aces Test!
Haywood Gray has his used oil tested regularly to ensure
the ongoing serviceability of the oil and well-being of the engine. In the engine oil
report card, wear metals tell the whole story. A high wear metal content indicates a high
rate of engine wear. In fact, most engine manufacturers publish upper limits on wear
metals content at which an oil must be changed to assure continued engine protection. Even
after 409,000 miles, AMSOIL protected better than Mack limits required. Now that’s
protection!
What Is Oil Analysis?
Oil analysis is a maintenance management tool that allows users to monitor equipment
condition for maximum equipment life, maximum lubricant drain interval length and optimal
downtime scheduling. Oil analysis saves users significant money by reducing equipment
replacements and repairs, reducing the volume of lubricant purchased and destined for
disposal and, most of all, by reducing downtime.
Oil analysis customers like Haywood Gray “trendline”
their oil analyses. Trendlining involves comparing the results of previous oil analysis
reports to those of the most recent report to establish trends in wear metals content,
viscosity, acid content, acid neutralization ability and other characteristics as
specified. Departures from established trends indicate a change in engine or lubricant
condition and the information they provide may be used to correct abnormal conditions
before they cause damage or failure.
AMSOIL Oil Analysis
The AMSOIL oil analysis program puts technologically advanced testing equipment in the
hands of experienced diagnosticians to deliver accurate, reliable, useful results.
AMSOIL
Oil Analysis Pricing
AMSOIL oil analysis sample kits include sample-gathering materials and testing.
UNITED STATES
CANADA
Sample Kits with complete analysis and two-way postage paid
Stock #
Description
Cost
Stock #
Description
Cost
G-1451
(1) sampling kit
$14.00
G-1451
(1) sampling kit
not available
G-1452
(10) sampling kits
$134.50
G-1452
(10) sampling kits
not available
G-1453
(25) sampling kits
$318.75
G-1453
(25) sampling kits
not available
G-1454
(50) sampling kits
$587.00
G-1454
(50) sampling kits
not available
G-1455
(100) sampling kits
$1075.00
G-1455
(100) sampling kits
not available
Sample Kits with complete analysis (not postage paid)
After 409,000 miles without
an oil change, the AMSOIL-protected Mack E7-400 engine in this truck was as wear-free as
an engine in comparable service treated to TWENTY TIMES the oil changes. 
Findings
