AMSOIL Signature Series Synthetic Motor Oil delivers extraordinary lubrication in all types
of automotive gasoline engines. By combining industry-premier synthetic technology with AMSOIL
premium additives, Signature Series Synthetic Motor Oil exceeds the higher performance demands
of modern engines. It withstands the stress of higher horsepower, higher heat and complicated
emissions control systems. Signature Series Synthetic Motor Oil is engineered to outperform
competitive conventional and synthetic motor oils. It delivers long-lasting performance and
AMSOIL, the leader in automotive 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 engine.
Extends Drain Intervals
AMSOIL Signature Series Synthetic Motor Oil can extend drain intervals far beyond those
recommended for conventional oils. Its unique synthetic formulation and long-drain additive
system are inherently stable to resist oxidation and neutralize acids over longer periods.
Signature Series Synthetic Motor Oil is designed to deliver the best possible engine
protection, cleanliness and performance over extended drain intervals. It reduces vehicle
maintenance and waste oil disposal costs.
Maximizes Fuel Economy
AMSOIL Signature Series Synthetic Motor Oil is designed to maximize energy efficiency for
improved fuel economy. Unlike conventional oils, its uniform molecular structure helps it flow
more freely and reduce friction between metal surfaces. Anti-friction additives are included to
further improve energy efficiency.
Reduces Engine Wear
Signature Series Synthetic Motor Oil provides outstanding anti-wear protection. It has
excellent viscosity film strength to separate metal surfaces and robust anti-wear additives to
further reduce wear in metal-to-metal contact regions for improved engine life.
Reduces Oil Consumption and Emissions
Volatility (burn-off) occurs when oil gets hot, causing high oil consumption and emissions.
AMSOIL Signature Series Synthetic Motor Oil exhibits an extremely low volatility rate; it
controls volatility-related oil consumption and emissions.
Excels in Extreme Temperatures
AMSOIL Signature Series Synthetic Motor Oil resists thermal (heat) breakdown better than
conventional oils. It is heavily fortified with detergent and dispersant additives to help
prevent sludge deposits and keep engines clean. And unlike conventional oils, Signature Series
Synthetic Motor Oil contains no wax, staying fluid in the coldest winter temperatures for
easier starting, improved oil flow and reduced bearing wear.
AMSOIL Signature Series Synthetic Motor Oil is excellent for use in all types of
gasoline-fueled vehicles. It is recommended for all domestic and foreign vehicles requiring any
of the listed performance specifications:
5W-30 (ASL): API SN (Resource Conserving), SM…; ILSAC GF-5, GF-4…; ACEA
A5/B5, A1/B1; Ford WSS-M2C946-A, WSS-M2C929-A; Chrysler MS-6395N; GM dexos1™ (supersedes
LL-A-025, 6094M and 4718M) Fortified with detergents that exceed dexos1™ sulfated ash
AMSOIL Signature Series Synthetic Motor Oil is compatible with other conventional and synthetic
motor oils. Mixing AMSOIL motor oils with other oils, however, will shorten the oil’s 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 synthetic motor oils.
AMSOIL Signature Series Synthetic Motor Oil is recommended for extended drain intervals in
unmodified(1), mechanically sound(2) gasoline-fueled vehicles as follows:
• Normal Service(3) – Up to 25,000 miles or one year, whichever comes first.
• Severe Service(4) – Up to 15,000 miles or one year, whichever comes first.
• In all non-gasoline-fueled vehicle applications, extend the oil change interval according to
oil analysis or follow the OEM* drain interval.
*OEM – Original Equipment Manufacturer
(1) Engines operating under modified conditions (non-stock) are excluded from extended drain
recommendations. Examples include the use of performance computer chips; non-OEM approved
exhaust, fuel or air induction systems; and the use of fuels other than those recommended for
normal operation by the manufacturer.
(2) Mechanically sound engines are in good working condition and do not, for example, leak
or consume excessive amounts of oil, are not worn out, do not overheat, do not leak antifreeze
and have properly working emissions control systems. AMSOIL recommends repairing malfunctioning
engines prior to the installation of AMSOIL synthetic oils.
(3) Personal vehicles frequently traveling greater than 10 miles (16 km) at a time and not
operating under severe service.
(4) Turbo/supercharged engines, commercial or fleet vehicles, excessive idling, vehicles
with more than 100,000 miles without prior continuous use of AMSOIL motor oil, daily short-trip
driving less than 10 miles (16 km), frequent towing, plowing, hauling or dusty condition
AMSOIL Ea® Full-Flow Oil Filters are designed for extended change intervals. They stop
smaller particles, flow more oil and last longer than regular filters. For best performance,
use AMSOIL Ea Full-Flow Oil Filters.
HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application
and according to the recommendations in the Material Safety Data Sheet (MSDS). An MSDS is
available via the Internet at upon request at (715) 392-7101. Keep Out of Reach of Children.
Don’t pollute. Return used oil to collection centers.
TYPICAL TECHNICAL PROPERTIES
Signature Series 100% Synthetic 5W-30
Motor Oil (ASL)
|Viscosity @ 100°C, cSt (ASTM D-445)
|Viscosity @ 40°C, cSt (ASTM D-445)
|Viscosity Index (ASTM D-2270)
|VISC. CCS, cP (ASTM
|Flash Point °C (°F) (COC) (ASTM
|Fire Point °C (°F) (COC) (ASTM D-92)
|Pour Point °C (°F) (ASTM D-97)
|NOACK (% weight loss) (ASTM D-5800)
|High Temperature/High Shear Viscosity
@ 150°C, 1.0 X 106 s.-1), cP (ASTM D-4172B)
|Four-Ball Wear Test @ 40 kgf, 75ºC,
1200 rpm, 1 hr, scar diameter, mm (ASTM D-4172)
|Total Base Number (ASTM D-2896)