AMSOIL Synthetic 10W-30 Motor Oil
(ATM) and 10 competing conventional
and synthetic 10W-30 motor oils were
subjected to a series of ASTM motor oil
tests. The competing oils included
petroleum-based Castrol GTX Drive
Hard, Mobil Drive Clean, Pennzoil with
Purebase, Quaker State Peak
Performance and Valvoline, as well as
synthetic-based Valvoline Synpower,
Quaker State, Castrol Syntec, Pennzoil
and Mobil SuperSyn Multi-Vehicle.

Seven tests were run on the motor oils. The Thin-Film Oxygen Uptake Test (TFOUT) measures the
oxidation stability of engine oils. The High Temperature/High Shear Test (HTHS) measures a lubricant's
viscosity under severe operating conditions. The NOACK Volatility Test measures the evaporation loss of
oils in high temperature service. Pour Point indicates the lowest temperature at which a fluid will flow.
Total Base Number (TBN) is the measurement of a lubricant's reserve alkalinity for combating acids. The
Cold Cranking Simulator Test (CCS) measures a lubricant's viscosity at low temperatures and high shear
rates. The Four-Ball Wear Test measures a lubricant's wear protection properties. The impressive test
results show
AMSOIL Synthetic 10W-30 Motor Oil outperformed the competitors in each test.


Thin-Film Oxygen Uptake
(ASTMD-4742)

The Thin-Film Oxygen Uptake Test
evaluates the oxidation stability of
lubricating oils. A mixture of the test oil
and chemistries found in gasoline
engine operation (oxidized/nitrated fuel,
soluble metals and distilled water) are
placed in a test vessel, which is
pressurized with oxygen and placed in
a heated bath. Anti-oxidant breakdown
is evident when the oxygen pressure
in the vessel rapidly decreases. At this
point, the induction time (break point)
of the oil is recorded. As shown in the
graph,
AMSOIL Synthetic 10W-30 Motor
Oil had the highest induction time of all
the tested oils. In fact, it didn't reach its
break point in over 500 minutes of
testing.

The superior oxidation stability of
AMSOIL Synthetic 10W-30 Motor Oil
allows it to effectively resist the
formation of engine deposits and sludge, keeping engines running clean and efficient and extending oil
life. It also resists thickening, maintaining its superior wear protection and lubricating properties and
maximizing fuel efficiency.


High Temperature/High Shear
(ASTM D-4683)

The High Temperature/High Shear Test
measures a lubricant's viscosity under
severe high temperature and shear
conditions that resemble highly-loaded
journal bearings in fired internal
combustion engines. In order to prevent
bearing wear, it is important for a
lubricant to maintain its protective
viscosity under severe operating
conditions. The minimum High
Temperature/High Shear viscosity for a
30 weight oil is 2.9 cP. As shown in the
graph,
AMSOIL Synthetic 10W-30 Motor
Oil surpasses this minimum standard
and displayed the highest High
Temperature/High Shear viscosity in
the group.

The superior viscosity retention of
AMSOIL Synthetic 10W-30 Motor Oil in the face of severe temperature and shear conditions allows it to
provide continuous, unsurpassed protection for engine bearings, extending equipment life and preventing
wear.



NOACK Volatility (ASTM D-5800)

The NOACK Volatility Test determines
the evaporation loss of lubricants in
high temperature service. The more
motor oils vaporize, the thicker and
heavier they become, contributing to
poor circulation, reduced fuel economy
and increased oil consumption, wear
and emissions. A maximum of 15
percent evaporation loss is allowable to
meet API SL and ILSAC GF-3
specifications. As shown in the graph,
AMSOIL 10W-30 Synthetic Motor Oil
outperformed its nearest competitor by
over 30 percent.

The extremely low volatility of
AMSOIL
Synthetic 10W-30 Motor Oil allows it to
maintain its superior protective and
performance qualities throughout
extended drain intervals, even when faced with severe operating temperatures. In addition, oil
consumption and emissions are minimized and fuel efficiency is maximized.




Pour Point (ASTM D-97)

The Pour Point Test determines the
lowest temperature at which a lubricant
will flow when cooled under prescribed
conditions. The lower a lubricant's pour
point, the better protection it provides in
low temperature service. As shown in
the graph,
AMSOIL Synthetic 10W-30
Motor Oil has the lowest pour point of
the tested oils.

The low pour point of
AMSOIL 10W-30
Synthetic Motor Oil allows it to maintain
its fluidity in extremely low temperatures,
reducing drag on moving vehicle parts,
providing critical engine components
with quick, essential lubrication and
easing startup in cold temperatures.
Wear is greatly reduced and equipment
life is extended.





Total Base Number (ASTM D-2896)

Total Base Number (TBN) is the
measurement of a lubricant's reserve
alkalinity, which aids in the control of
acids formed during the combustion
process. The higher a motor oil's TBN,
the more effective it is in suspending
wear-causing contaminants and
reducing the corrosive effects of acids
over an extended period of time. As
shown in the graph,
AMSOIL Synthetic
10W-30 Motor Oil has the highest TBN
of the tested oils.

The high TBN of
AMSOIL Synthetic
10W-30 Motor Oil allows it to effectively
combat wear-causing contaminants and
acids, providing superior protection and
performance over extended drain intervals.




Cold Crank Simulator
(ASTM D-5293)

The Cold Crank Simulator Test
determines the apparent viscosity of
lubricants at low temperatures and high
shear rates. Viscosity of lubricants
under these conditions is directly related
to engine cranking and startability. The
lower a lubricant's cold crank viscosity,
the easier an engine will
turn over in cold temperatures. 10W
motor oils are tested at -25°C and must
have a viscosity below 7000 cP to pass.
As shown in the graph,
AMSOIL
Synthetic 10W-30 Motor Oil is well below
the maximum requirement, while many
of the competing oils barely pass.

The low cold crank viscosity of
AMSOIL
Synthetic 10W-30 Motor Oil reduces
drag on moving engine parts and allows engines to achieve critical cranking speed in extremely frigid
temperatures. Engines turn over quickly and dependably in the coldest winter temperatures.




Four Ball Wear (ASTM D-4172)

The Four Ball Wear Test determines
the wear protection properties of a
lubricant. Three metal balls are clamped
together and covered with the test
lubricant, while a rotating fourth ball is
pressed against them in sliding contact.
This contact typically produces a wear
scar, which is measured and recorded.
The smaller the average wear scar, the
better the wear protection provided by
the lubricant. As shown in the graph,
AMSOIL Synthetic 10W-30 Motor Oil
produced the smallest wear scar of the tested lubricants.





AMSOIL Synthetic 10W-30 Motor Oil provides unsurpassed protection against
engine wear. Equipment life is extended, and repairs, downtime and expenses
are reduced.

AMSOIL INC. has been the leader in synthetic motor oil formulation since its
introduction of the world's first API rated synthetic motor oil in 1972. By
specializing exclusively in the synthetic lubricant technology,
AMSOIL is able to
optimize the most advanced chemistries available.
Retail and commercial businesses can enroll for FREE, as accounts for factory
direct wholesale pricing with no obligations or minimum purchases.
Save about 20% to 25% off our
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and start your very own business. No minimums,
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------         Synthetic Lubricants - Proven #1 in Lubrication, Filtration, Usage and Testing
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