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FUEL REQUIREMENTS
While operating on gasoline with the required
octane number, hearing a light knocking sound
from the engine is not a cause for concern.
However, if the engine is heard making a heavy
knocking sound, see a dealer immediately. Use of
gasoline with a lower than recommended octane
number can cause engine failure and may void the
New Vehicle Limited Warranty.
Poor quality gasoline can cause problems such as
hard starting, stalling, and hesitations. If you
experience these symptoms, try another brand of
gasoline before considering service for the vehicle.
6.2L A
6.4L E
ND
NGINE
Do not use E-85 flex fuel or ethanol blends greater
than 15% in this engine. The use of octane
boosting additives is NOT permitted for use in the
6.2L Supercharged engine.
These engines are designed to meet all
emission regulations, provide optimal
fuel economy and performance when
using high-quality unleaded premium
gasoline having a posted octane number of 91 as
specified by the (R+M)/2 method. The use of 91 or
higher octane premium gasoline is required in
these engines.
R
G
EFORMULATED
ASOLINE
Many areas of the country require the use of
cleaner-burning gasoline referred to as
"reformulated gasoline". Reformulated gasoline
contains oxygenates and are specifically blended to
reduce vehicle emissions and improve air quality.
The use of reformulated gasoline is recommended.
Properly blended reformulated gasoline will
provide improved performance and durability of
engine and fuel system components.
M
A
T
F
ATERIALS
DDED
O
UEL
Besides using unleaded gasoline with the proper
octane rating, gasolines that contain detergents,
corrosion and stability additives are
recommended. Using gasolines that have these
additives will help improve fuel economy, reduce
emissions, and maintain vehicle performance.
Designated TOP TIER Detergent Gasoline
contains a higher level of detergents to
further aide in minimizing engine and
fuel system deposits. When available,
the usage of TOP TIER Detergent gasoline is
www.toptiergas.com
recommended. Visit
of TOP TIER Detergent Gasoline Retailers.
TECHNICAL SPECIFICATIONS
Indiscriminate use of fuel system cleaning agents
should be avoided. Many of these materials
intended for gum and varnish removal may contain
active solvents or similar ingredients. These can
harm fuel system gasket and diaphragm materials.
G
/O
ASOLINE
XYGENATE
Some fuel suppliers blend unleaded gasoline with
oxygenates such as ethanol.
CAUTION!
DO NOT use E-85, gasoline containing methanol,
or gasoline containing more than 15% ethanol
(E-15). Use of these blends may result in starting
and drivability problems, damage critical fuel
system components, cause emissions to exceed
the applicable standard, and/or cause the
Malfunction Indicator Light to illuminate. Please
observe pump labels as they should clearly
communicate if a fuel contains greater than
15% ethanol (E-15).
Problems that result from using gasoline
containing more than 15% ethanol (E-15) or
for a list
gasoline containing methanol are not the
responsibility of the manufacturer and may void or
not be covered under New Vehicle Limited
Warranty.
81
B
LENDS
9
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