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SAE 10W-40 Synthetic Motorcycle Oil (MCF)
AMSOIL Synthetic Motorcycle Oils have been
reformulated with new high performance additive
technology that provides even greater multi-functional
benefits for the special requirements of motorcycle
applications. These independent and exclusive new
AMSOIL formulations provide second-to-none viscosity
protection for hot-running American and foreign
motorcycle engines, transmissions and primary
chaincases. Performance specifications include:API SG,
SL/CF, CG-4; JASO MA/MA2; ISO-L-EMA2; API GL-1
High Performance Lubricant for
Engines and Transmissions
Package sizes include:

1-Quart Bottle
1-Quart Bottles (case of 12)
1-Gallon Bottle
1-Gallon Bottles (case of 4)
30-Gallon Drum
55-Gallon Drum
PRODUCT DESCRIPTION
AMSOIL Synthetic 10W-40 Motorcycle Oil (MCF) is a premium oil designed for those who demand
the absolute best lubrication for their motorcycles. AMSOIL MCF is the result of extensive
research, and it is specially formulated to excel in all areas unique to motorcycles, including high
engine RPM, wet clutch lubrication, extreme pressure regions of gears and rust common to short
drives and storage.

AMSOIL MCF is multi-functional and fulfills the requirements of both domestic and foreign
motorcycles. It outperforms other conventional and synthetic motorcycle oils.

AMSOIL, the leader in synthetic lubrication, produced the world’s first API qualified synthetic motor
oil in 1972. Trust the extensive experience of AMSOIL The First in Synthetics® to do the best job
protecting your motorcycle.

Reduces Friction, Heat and Wear
In high heat conditions, engine protection is not sacrificed with AMSOIL Synthetic Motorcycle Oil. It
has the best high temperature film strength (see High Temperature Viscosity Protection graph
below) of all oils tested and contains a heavy treatment of anti-wear additives to reduce wear
regardless of the operating conditions (see Wear Comparison graph at right). AMSOIL MCF is
thermally (heat) stable and contains maximum levels of oxidation inhibitor additives. It is extremely
resistant to breakdown and engineered to prevent damaging sludge and carbon deposits for
superior engine cleanliness.
10W-40 Motorcycle Oil
High Temperature Viscosity Protection
Higher values reflect better film strength
ASTM Test Method D-4683
March 16, 2005
10W-40 Motorcycle Oil
ASTM Test Method D-4172
March 16, 2005
(click graph to see larger image)
Provides Extreme Pressure Quality Protection for Gears
With AMSOIL MCF, there is no need for separate transmission lubricants. It is absolutely shear
stable and will not thin out from mechanical activity. AMSOIL MCF performs like a gear lube
without the negative effects of extreme pressure additives. In the FZG gear test, AMSOIL MCF
achieved a perfect score with a “zero” wear rating (see photo below).
FZG Gear Test (ASTM D-5182)
AMSOIL 10W-40 (MCF)
FZG Gear Test (ASTM D-5182)
Motul 300 V 10W-40
Delivers Superior Rust Protection
Motorcycles are prone to rust from storage, humidity and short drives. Rust can cause major
damage such as uncontrolled wear, compression loss and blow-by. Good rust protection,
however, comes by design and is not natural to engine oils. Unlike many motorcycle oils, AMSOIL
MCF contains special anti-rust agents. It passes the ASTM D-1748 humidity cabinet rust test and
clearly demonstrates superior rust protection (see photos below).
Rust Test ASTM D-1748
AMSOIL 10W-40 (MCF)
Rust Test ASTM D-1748
Castrol GPS 10W-40
Provides Excellent Wet Clutch Performance
engagement. AMSOIL MCF controls heat and prevents slippage and glazing, helping improve clutch
life. AMSOIL Synthetic 10W-40 Motorcycle Oil meets the wet clutch frictional requirements of JASO
Standard T903: 2006, MA/MA2 and ISO-L-EMA2 of ISO Standard 24254:2007.

For irrefutable proof of the superiority of AMSOIL Synthetic Motor Oils refer to the AMSOIL A Study
of Motorcycle Oils white paper (G2156).

APPLICATIONS
AMSOIL Synthetic 10W-40 Motorcycle Oil is recommended for liquid or air-cooled 4-stroke engines.
It meets SAE 80W/90, API GL-1 gear oil requirements and is recommended for transmissions on
both 4- and 2-stroke motorcycles. AMSOIL MCF is recommended for Honda®, Kawasaki®,
Yamaha®, Suzuki®, BMW®, Husqvarna®, Victory® and other motorcycles where 10W-40 or 20W-40
engine oils or SAE 80W/90, GL-1 gear oils are used. Not recommended where an API GL-4 or GL-5
gear oil is required.

MIXING AMSOIL
AMSOIL Synthetic 10W-40 Motorcycle Oil is compatible with conventional and synthetic motor oils;
however, mixing oils may shorten the oil life expectancy and reduce the performance benefits.
AMSOIL does not support extended drain intervals where oils have been mixed.

Aftermarket oil additives are not recommended for use with AMSOIL motorcycle oil.

SERVICE LIFE
For “on-road” use in engines and transmissions, change AMSOIL MCF and AMSOIL engine oil filter
at twice the motorcycle manufacturer change interval or one year, whichever comes first. Change
other brand oil filters at standard intervals.

For “off-road” use in engines and transmissions, change AMSOIL MCF at the standard motorcycle
manufacturer change interval.

For racing or in engines modified from the original factory design, no change interval
recommendation is made. Oil changes are at the owner’s discretion.
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)
13.9
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)
93.36
Viscosity Index (ASTM D-2270)
152
Pour Point °C (°F) (ASTM D-97)
-46 (-51)
Flash Point °C (°F) (ASTM D-92)
234 (453)
Fire Point °C (°F) (ASTM D-92)
244 (471)
Four Ball Wear Test
(ASTM D-4172B: 40 kgf, 75°C, 1200 rpm, 1 hr), Scar, mm
0.40
Noack Volatility, % weight loss (g/100g) (ASTM D-5800)
6.44
High Temperature/High Shear Viscosity
(ASTM D 4683 @ 150°C, 1.0 X 106 s.-1), cP
4.52
Foam (ASTM D-892, Sequence I, II & III
0/0/0
Shear Stability Kurt Orbahn (ASTM D-6278), % viscosity change 120 cycles
0.495
Rust Test - Humidity Cabinet (ASTM D-1748)
No Rust, Pass
Total Base Number
11
TYPICAL TECHNICAL PROPERTIES

SAE 10W-40 Synthetic Motorcycle Oil (MCF) revised as of 6/07
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