
AMSOIL Synthetic Motor Oil
Outperforms the Competition
November 2008 test results

AMSOIL Synthetic 10W-30 Motor Oil (ATM) and
10 competing conventional, synthetic and
synthetic blend 10W-30 motor oils were
subjected to a series of motor oil tests.
All six tests were completed in
accordance with American Society of Testing
and Materials (ASTM) test procedures
with the results directly indicating the level of
protection and performance provided by each
of the tested oils. When testing concluded,
AMSOIL Synthetic Motor Oil overwhelmingly
emerged as the top-performing oil in the group.
No oil outperformed AMSOIL in any of
the tests. A comparison also
reveals the total cost of using AMSOIL
Synthetic Motor Oil is less over 25,000
miles than all the competing motor oils. EXTENDS
OIL LIFE
The Thin Film Oxygen Uptake Test (TFOUT)
is used to evaluate an engine oil’s ability
to resist heat and oxygen breakdown when
contaminated with oxidized/nitrated fuel,
water and soluble metals such as lead,
copper, iron, manganese
and silicon. The higher the number,
the better the resistance to chemical
breakdown. AMSOIL Synthetic Motor Oil has
superior heat and oxidation resistance to
control sludge deposits and extend oil life.
Engines stay clean for maximum protection
and oil changes are reduced, saving time and
money.

IMPROVES COLD
TEMPERATURE PERFORMANCE
The Pour Point Test determines the lowest
temperature at which a lubricant will flow.
The lower a lubricant’s pour point, the
better protection it provides in low temperature
service. Unlike conventional oils that solidify in
cold temperatures, AMSOIL Synthetic
Motor Oil remains fluid down to -54° F.
AMSOIL Synthetic Motor Oil helps engines
turn over easier and flows quickly to engine
parts for critical start-up protection. Engines
start faster and wear is greatly reduced for
extended engine life.

MAXIMIZES FUEL ECONOMY,
REDUCES OIL CONSUMPTION
AND EMISSIONS
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. The lower the number, the better
the resistance to vaporization. AMSOIL Synthetic Motor Oil
resists high temperature volatilization
(evaporation) better than other motor oils.
AMSOIL Synthetic Motor Oil maintains peak
fuel efficiency and reduces oil consumption
and emissions.

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

HELPS ENGINES
START EASIER
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 start-ability.
The lower a lubricant’s cold crank
viscosity, the easier an engine will turn
over in cold temperatures. The low cold crank viscosity of
AMSOIL Synthetic Motor Oil reduces
drag on moving engine parts and allows
engines to achieve critical cranking speed
in frigid temperatures.
Engines turn over quickly and dependably
in the coldest winter temperatures
and motor oil flows to critical areas
requiring immediate lubrication, protecting
against wear at start-up.

PROTECTS AGAINST
WEAR
The Four-Ball Wear Test evaluates the
protection provided by engine oil under
conditions of pressure and sliding motion.
The size of the scar left as a result of the
test determines the amount of wear protection
the lubricant provides. The smaller the
wear scar, the better the protection. Tests show that no
other motor oil demonstrates better
anti-wear performance than AMSOIL Synthetic
Motor Oil. With AMSOIL Synthetic Motor Oil,
engine life can be extended and major
repairs are often reduced.

SAVES MONEY
By extending oil drain intervals through its
premium formulation, AMSOIL Synthetic
Motor Oil saves drivers money. A value comparison
shows AMSOIL Synthetic Motor Oil
costs less than competing motor oils over
25,000 miles. While competing motor oils must be
changed up to five times over 25,000 miles,
AMSOIL Synthetic Motor Oil is only changed
once, saving both time and money.

| Motor Oil |
Price/Qt. (Retail) |
Price/Oil Change
(5 qts) |
Drain Interval (Miles) |
No. of Oil Changes Over 25,000 Miles |
Cost Per 25,000 Miles |
| AMSOIL |
$8.90 |
$44.50 |
25,000 |
1 |
$44.50 |
| Trop Artic |
$2.21 |
$11.05 |
5,000 |
5 |
$55.25 |
| Shell Formula |
$2.39 |
$11.95 |
5,000 |
5 |
$59.75 |
| Chevron Supreme |
$2.59 |
$12.95 |
5,000 |
5 |
$64.75 |
| Mobil 1 Extended Performance |
$7.29 |
$36.45 |
15,000 |
2 |
$72.90 |
| Kendall GT-1 High Performance |
$3.21 |
$16.05 |
5,000 |
5 |
$80.25 |
| Castrol GTX |
$3.29 |
$16.45 |
5,000 |
5 |
$82.25 |
| Motorcraft |
$3.49 |
$17.45 |
5,000 |
5 |
$87.25 |
| Quaker State Horse Power |
$5.49 |
$27.45 |
5,000 |
5 |
$137.25 |
| Pennzoil Platinum |
$6.49 |
$32.45 |
5,000 |
5 |
$162.25 |
| Valvoline SynPower |
$6.49 |
$32.45 |
5,000 |
5 |
$162.25 |
AMSOIL, A Company of Firsts
 |
First to develop an API
rated 100 percent synthetic motor oil. |
 |
First to introduce the
concept of “extended drain intervals” with a
recommended 25,000-mile/12-month drain interval. |
 |
First U.S. company to
utilize the NOACK volatility test as a standard
of performance excellence. |
 |
First to produce synthetic
motor oils for diesel engines, racing
engines, turbos and marine engines. |
 |
First to introduce synthetic
oils that legitimately contribute to imrproving
fuel efficiency. |
 |
First to manufacture
synthetic gear lube for automotive use. |
 |
First to manufacture a 100:1
pre-mix synthetic 2-cycle oil. |
 |
First to manufacture a
synthetic automatic transmission fluid for
automotive use. |

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