Fuel Requirements - ILMOR MV8 570 Owner's Manual

SECTION 3 ILMOR HIGH-PERFORMANCE OWNER'S MANUAL
3-2
Be certain to read carefully the boat manufacturer's Owner's Manual
section on fueling for additional information and details. This is a critical
component of safe and enjoyable boating.
DANGER! Never start the engine if a gasoline odor is present or if
gasoline can be seen at any point along the fuel line, along the fuel tank,
in the bilge or at the engine.

FUEL REQUIREMENTS

The Ilmor High-Performance Marine engines require a minimum of:
MV8-570: 91 octane fuel
MV10: 91 octane fuel
The octane number is based on the pump octane number, which is
(R + M)/2, where R is the research octane number and M is the motored
octane number.
For better performance, 93 octane fuel is recommended.
91
MINIMUM OCTANE RATING
(R + M) / 2 METHOD
MINIMUM
Fuels other than specified will negatively alter performance and emissions,
and could damage the engine. Use of lower octane fuels will cause spark
knock (pinging). Continued heavy spark knock can cause severe engine
damage. The engines have knock detection systems that offer the best
engine performance by controlling knock through precise ignition timing.
The higher octane fuel will cause less knock for the ignition system to
process and adjust for.
Poor-quality or old fuels can cause problems such as loss of performance,
rough idling, hard starting and hesitation. If the engine experiences any of
these symptoms, first try another brand of gasoline and/or replace the old
gasoline with fresh gasoline.
Many engine manufacturers believe the U.S. Environmental Protection
Agency's (EPA's) detergent levels in gasolines do not provide sufficient
deposit controls to allow for optimal engine performance. As a result, TOP
TIER Detergent Gasoline standards were created to ensure gasolines have
all the necessary additives and detergents to reduce the buildup of deposits
in an engine. Ilmor recommends purchasing fuel from a supplier that
confirms its fuel meets TOP TIER specifications. For a list of TOP TIER
retailers, check www.toptiergas.com, and click on "Retailers. "
NOTICE: Always use a high-quality gasoline from a reputable source.
Damage to the engine by use of low-quality gasoline or gasoline with an
octane rating below the minimum level listed for Ilmor High-Performance
Marine engines will void the warranty on the engine.
93
MINIMUM OCTANE RATING
(R + M) / 2 METHOD
BEST
Ilmor High-Performance Marine, LLC
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