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Which AMSOIL Products Are Recommended
For Your Vehicles?
ZDDP Zinc Dialkyldithiophosphate
Provides Proven Wear Protection
Incompatibility With Pollution-Reduction Devices Severely
Limits Its Use in Modern Motor Oils.
automotive engines push the envelope seeking higher fuel economy
and lower emissions, the demands placed on motor oil are escalating.
This push for improved performance is nothing new. Racers
and muscle-car owners have long looked for ways to squeeze
more horsepower from their vehicles. This is often done in
vintage cars by modifying the engine, while tuner enthusiasts
usually focus on computer-controlled performance improvements.
Whatever your preferred method, it puts more stress on engine
components, and the oil must protect parts from wear even as they are
pushed beyond the limits of OEM design. This is where the
most recognized anti-wear additive, zinc dialkyldithiophosphate
(ZDDP), comes into the picture.
ZDDP is very good
at reducing wear and improving oxidation stability. It also
exhibits mild extreme-pressure (EP) protection. ZDDP contains
both zinc and phosphorus components that work together to
provide anti-wear protection and minimize lubricant breakdown.
Specifically, ZDDP helps protect high-impact surfaces like
camshaft lobes, lifter surfaces and rockers against wear.
As temperatures rise and surfaces come closer together, ZDDP
decomposes and the resulting chemistry is what protects the
critical metal surfaces. When parts move during operation,
any sliding or rolling motion takes place on top of or within
the ZDDP anti-wear film, which reduces metal-to-metal contact.
This is especially important in modified engines with flat-tappet
camshafts because the engine is creating more horsepower than
it was designed for, which puts more stress on the engine.
The camshaft and lifters are responsible for triggering the
precisely tuned movements of the valvetrain. Without the protective
film barrier provided by ZDDP, the cams and lifters will wear
from the force of operation, resulting in poor performance.
All engines benefit from oils with superior film strength
and anti-wear properties, so why don't all motor oils
have boosted levels of ZDDP? It's back to the goal of
improving emissions systems performance. Generally, ZDDP used
in high levels results in volatile phosphorus being transferred
from the combustion chamber to the catalytic converter. Like
with lead in 1970s gasoline, phosphorus can blind over the
catalytic reaction sites in the converter, making it less
efficient in turning carbon monoxide (CO) into carbon dioxide
(CO2). The EPA mandates that catalytic converters operate
as designed for more than 100,000 miles. As a result, ZDDP
levels are now limited for newer motor oil specifications. The largest portion of the volatile phosphorus
is generated right after you change your oil. So the
more you change your oil, the more your catalytic converter
is exposed to this volatile phosphorus. Conversely, longer
drain intervals can limit the negative impact of volatile
phosphorus on catalytic converters.
Both engine technology
and oil technology have evolved over the years. Today's performance
engines have very different oil requirements compared to older
engine designs from the 1960s and 1970s. Many new engines
use roller cams, which aren't as sensitive to ZDDP anti-wear
protection as older flat-tappet camshafts and solid lifters.
Older engines equipped with flat-tappet cams require higher
levels of anti-wear/ mild EP (ZDDP) than today's engines.
This area in an engine is exposed to extreme contact load.
Since this load increases significantly when non-stock, high-pressure
valve springs are used, the use of properly formulated motor
oils is extremely important to reduce wear and extend flat-tappet
and camshaft life, especially during the critical break-in
period. Since the amount of zinc and phosphorus in oils formulated
for today's automobiles has been greatly reduced and
newer API oils are not designed specifically for older-style,
modified engines, engine wear can be a major issue.
a complete line of motor oils tailored to meet the
specific needs of classic cars and other vehicles requiring
higher anti-wear/mild EP protection. AMSOIL Z-ROD® Synthetic Motor Oil
(ZRT, ZRF) is designed with the level of anti-wear/ mild EP
required to safely protect older and modified engine designs
such as those with flat-tappet camshafts. It is also designed specifically
to resist rust and corrosion that attacks engines
during periods of inactivity and storage. AMSOIL DOMINATOR®
Synthetic Motor Oil (RD20, RD30, RD50, RD60) is formulated
similarly, but more for true racing applications. This makes
it the right choice for muscle cars, street rods and other
high-performance vehicles with flat-tappet camshafts. AMSOIL
Break-In Oil (BRK) is designed to work quickly in new and rebuilt high-performance and racing
engines. This SAE 30 viscosity grade oil features a no-friction-modifier
formula that helps induce controlled wear in rings to help
mate and seat piston rings. It also has very high levels of
a classic-car enthusiast, hot rodder, tuner or drifter, your
equipment may require the protection provided by these products.
Knowledge is power; but we want you to experience maximum
power from your engine also! Published, AMSOIL Magazine 12/13.
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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