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AMSOIL Introduces Specially Formulated
Synthetic Oils
for Four Stroke Outboard Engines
Marine
4-Stroke 10W-30
Marine
4-Stroke 10W-40
Four-stroke gasoline
engines have long been a mainstay of the general marine
industry. They have succeeded in reducing emissions and
increasing fuel efficiency, and they have also been a hit
with consumers. In fact, Mercury Marine has seen its
fourstroke outboard sales surpass its twostroke sales. When
four-stroke outboard motors were introduced to the market,
manufacturers recommended either their own specially
formulated oil or an API SG or SL automotive oil. However,
because the specific lubrication requirements of automobiles
and outboard motors are different, it soon became apparent
that four-stroke outboard motors would require their own oil
specification. This standard, entitled FC-W, was released by
the National Marine Manufacturers Association (NMMA) in
August 2004.
New
AMSOIL
Formula 4-Stroke® Marine Synthetic Motor Oils are premium
quality synthetic formulations engineered for the harsh
operating conditions of marine environments. They withstand
the intense mechanical activity of continuous, high RPM
operation to deliver superior viscosity protection. Formula
4-Stroke® Marine Synthetic Motor Oils are specially
fortified with a heavy treatment of advanced additives that
protect motors against wear, rust and deposits, and they
excel in both high horsepower applications and all-day
trolling conditions (see four-ball wear charts).
4-Stroke
Outboard Motor Warranty Certified
Formula 4-Stroke® Marine
Synthetic Motor Oils are certified by the National Marine
Manufacturers Association (NMMA) for use in four-stroke
outboard motors. These high quality oils demonstrate
outstanding performance, exceeding the NMMA “FC-W” (Four
Cycle -Water) specification requirements. Only five
manufacturers currently produce FC-W certified oil. Formula
4-Stroke® Marine Synthetic Motor Oils fulfill the warranty
requirements of four-stroke outboard motor manufacturers.
• NMMA Registration
#FB-30010B 10W-40
• NMMA Registration #FB-30011B 10W-30
Superior Protection Against
Engine Wear
Marine engines operate
under high loads and RPMs for extended periods of time,
causing traditional automotive oils to break down and lose
viscosity. While automobile engines normally operate at
around 2,500 rpm, outboard motors can run twice as fast,
requiring greater levels of wear protection and better
bearing durability than automobiles. In addition, prolonged
idling and low operating temperatures contribute to fuel
dilution, further thinning the oil. To ensure adequate
protection for their engines, marine engine manufacturers
set minimum high temperature/high shear (HTHS) viscosity
limits. AMSOIL Formula 4-Stroke® Marine Synthetic Motor Oils
are shear stable and formulated with sophisticated oil
additive chemistry, exceeding the HTHS requirements of both
the API and NMMA FC-W (see graph).
Four-stroke engines in
inboard and sterndrive power plants feature horizontally
mounted crankshafts, retaining a small level of oil in the
bottom of the crankshaft bearings upon shutdown. This
residual oil helps protect the bearings until the oil pump
can supply additional oil volume. However, the design
configurations of four-stroke outboard motors present a
challenge to marine lubricants. Four-stroke outboards
feature vertically mounted crankshafts, limiting oil
retention at shutdown and increasing the likelihood of dry
starts and accelerated wear. Formula 4-Stroke® Marine
Synthetic Motor Oils contain a high concentration of premium
quality anti-wear additives that provide an extra level of
wear control upon start-up.
Excellent
Anti-Rust Performance
Marine engines are prone
to rust, leading to uncontrolled wear and premature engine
failure. However, good rust protection is not a natural
attribute of engine oil. It comes only by design. Formula
4-Stroke® Marine Synthetic Motor Oils contain maximum
treatments of special rust and corrosion inhibitors that
ensure long-lasting engine protection during both idle and
storage periods.
Applications
AMSOIL
Formula 4-Stroke® Marine Synthetic 10W-30 (WCT) and 10W-40 (WCF)
Motor Oils are FC-W registered and warranty certified for
use in four-stroke outboard motors. They surpass the FC-W
four-stroke outboard motor performance requirements
established by the National Marine Manufacturers Association
(NMMA) and are recommended for gasoline-fueled four-stroke
outboard, inboard, stern drives (inboard/outboards) and
personal watercraft motors. Use the appropriate viscosity
grade where specified in the following:
Four-stroke outboard motors: Honda®, Mercury®,
Suzuki®, Evinrude/Johnson®, Bombardier/BRP®, Yamaha®,
Nissan®, Tohatsu®
Inboard and I/O: Mercruiser®, Volvo Penta®,
OMC®, Chrysler® Marine, Crusader®, Marine Power®,
Chevrolet®, Ford®
Personal Watercraft: Honda®, Yamaha®, Bombardier/BRP®
(Sea Doo®), Polaris®
For inboard motor
applications, drain intervals may be extended to two times
the engine manufacturer recommended interval or one year,
whichever comes first. |
