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Which AMSOIL Products Are Recommended
For Your Vehicles?
Variable Valve Timing Presents
Yet Another Complexity For Motor Oils to Overcome
Than Ever, Quality Motor Oil is Key to Engine Longevity.
Technical Product Manager,
Driven by higher
fuel-economy requirements and increasingly stringent emissions
limits, vehicle manufacturers are adding new technology to
engines and making advancements to existing systems. The system
used to vary the timing of intake and exhaust valves opening
and closing is one area receiving lots of attention.
Like people, engines
must also "breathe." To combust one gallon of gasoline,
an average engine requires approximately 10,000 gallons of
air. Getting the most from the fuel-air mixture is vital for
top engine performance. This requires precise regulation of
valvetrain components, including the camshaft and valves.
Valves are opened and closed to control the delivery of fresh
air and fuel to the cylinder and to evacuate exhaust gases
from the cylinder after burning fuel. The action of the valves
is controlled by the camshaft. Valves are pushed open by cams
(lobes) and closed by springs. Valve timing is controlled
by the shape of the cam lobe and position of the camshaft
relative to the crankshaft. In traditional engine designs,
the timing of each valve is locked and cannot be changed without
physically changing the camshaft. As a result, some engines
have camshaft designs that create great low-engine-rpm performance,
or others, like old street rods or dragsters, that have very
good high-rpm performance. The challenge is creating a system
that performs efficiently at both low engine rpm and high
engine rpm. Enter variable valve timing systems.
timing (VVT) is a decades-old technology that was introduced
to overcome the inherent limitations of fixed valvetrain systems.
Its use has steadily grown since the late-1990s, and VVT can
now be found in nearly all 2011 and later vehicles. VVT permits
the opening and closing action of the valves to occur sooner,
or be delayed, relative to the position of the piston. This
makes it possible to achieve optimal fuel economy and performance
at low speeds and when passing someone on the highway. It
also results in lower emissions.
There are several
VVT systems used by OEMs, and there have been recent advancements
in the control of these systems. Many systems use oil-pressure-operated
mechanical devices to change valve timing (when the valve
opens and closes), valve duration (how long the valve is open)
and valve lift (how far the valve opens). For example, the
Honda i-VTEC system uses oil pressure to lock the motion of
intake valves together via pins and transfers their motion
to a different cam profile
to adjust for the boost in performance required above 4500
rpm. At low engine speeds, the intake valves
are opened slightly to reduce fuel consumption while providing
enough torque for acceleration; at high engine speeds the
intake valves are opened wide for increased power.
such as Toyota's VVT-i, vary the valve motion by adjusting
the timing of the camshaft in relation to engine speed. Oil-pressure-actuated
devices, commonly called cam phasers, are used to control
that motion. Cam phasers allow the valves to open or close
earlier or later in relation to the position of the piston.
When the intake and exhaust valves are operated by separate
camshafts, the timing of those valves can then be changed
independently. This makes it possible to increase the time
that the intake and exhaust valves are open simultaneously
- also known as valve overlap - which is used to help control
emissions. Controlling valve overlap allows engines to implement
internal exhaust gas recirculation (EGR), which has improved
performance over the alternative external-valve EGR technology.
VVT systems are
complex arrangements involving many intricate components,
and they often involve oil-actuated hydraulic devices to control
valve motion. They are generally non-serviceable, and many
common problems associated with VVT
systems are linked to poor oil or filter performance. Sludge
or deposits can plug the solenoid screen or oil galleries
and impact the operation of VVT mechanisms. This not only
disrupts performance, it can be the first step toward a costly
With vehicle manufacturers
wringing every bit of efficiency out of systems to meet fuel-economy
requirements, using high-quality motor oil of the proper viscosity
is extremely important. The consistent flow of clean oil is
vital for VVT systems' operation. This means motor oil must
have excellent cold-temperature properties to move quickly
through the small oil galleries upon startup. It must also
have the proper balance of detergents and dispersants to prevent
deposits, sludge and varnish that clog hydraulic pathways
critical to proper engine operation. AMSOIL synthetic motor
oils are engineered for the performance demands of VVT technology
and promote component longevity to ensure that the systems
function properly. Published, AMSOIL
AMSOIL Signature Series
Synthetic Motor Oil
AMSOIL Signature Series Synthetic
Motor Oils are formulated to meet the latest API SN Resource
Conserving and ILSAC GF-5 industry specifications. AMSOIL
Signature Series Oils include 0W-20, 0W-30, 5W-30 and 10W-30
and represent the very best motor oils AMSOIL has to offer,
allowing motorists to take advantage of maximum extended
drain intervals. AMSOIL Signature Series Synthetic Motor
Oils are recommended for drain intervals of up to 25,000
miles/one year, whichever comes first (15,000 miles/one
year in severe service conditions).
here for more information
Synthetic Motor Oils offer the longest drain intervals
on the market, unsurpassed protection and performance that
effectively extends equipment life and improved fuel economy,
saving customers money at the pump and reducing the nation's
dependence on foreign oil.
The Presidents Desk
Synthetic Diesel Oil Articles and Testimonials
INC. warrants that the use of its lubricants will not cause
mechanical damage to any mechanically sound equipment when
AMSOIL INC. products are used in full compliance with the
company's recommendations and instructions."
synthetic motor oils are formulated to surpass engine test
specifications, offering protection far greater than competing
motor oils for extended drain intervals. Most synthetic oil
manufacturers make no claim to extended drain intervals, deferring
to the maintenance schedule provided by the vehicle manufacturer.
With its unparalleled oil and warranty program, AMSOIL offers
consumers unprecedented protection and economics.
More than 20 years
ago, AMSOIL began using the NOACK volatility test as a comparison
tool and measurement of quality. Back then, nearly every oil
tested side-by-side with AMSOIL synthetic motor oils failed,
and those that passed barely squeaked by. Other oil companies
paid no attention to NOACK results until Ford Motor Company
made it a requirement for service fill oils, validating what
AMSOIL had said all along.
NOACK Volatility Test
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. AMSOIL
Synthetic Motor Oil resists high temperature volatization
better than other motor oils. AMSOIL Synthetic Motor
Oil maintains peak fuel efficiency and reduces oil consumption
AMSOIL Now An ISO Certified
received ISO 9001:2000 certification of our Quality Management
System (QMS). NSF International Strategic Registrations is
the registrar that has verified our QMS meets the requirements
of the ISO 9001:2000 standard, the most widely utilized quality
standard throughout the world for quality management systems.
ISO standards are used by over 300,000 companies worldwide
setting rigorous standards for businesses, government and
is applicable to any manufacturing and service organization
providing a framework for system development that focuses
on the customer, quality system performance and ongoing improvement.
AMSOIL received ISO 9001:2000 registration under the scope:
synthetic lubricants blending, packaging, and other fulfillment
directly associated with lubricant product.
certification puts AMSOIL in line with some of the most efficient
companies in the world. It is further assurance that the products
and services AMSOIL provides will continue to maintain the
high level of quality the company always demanded.
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