Fuel Requirements; L Engine - Dodge DURANGO 2021 Owner's Manual

Inspect the wheel mounting surface prior to
mounting the tire and remove any corrosion or
loose particles.
Wheel Mounting Surface
Tighten the lug nuts/bolts in a star pattern until
each nut/bolt has been tightened twice. Ensure
that the socket is fully engaged on the lug nut/
bolt (do not insert it half way).
NOTE:
If in doubt about the correct tightness, have
them checked with a torque wrench by an
authorized dealer or service station.
After 25 miles (40 km), check the lug nut/bolt
torque to be sure that all the lug nuts/bolts are
properly tightened.
Torque Patterns
WARNING!
To avoid the risk of forcing the vehicle off the jack,
do not tighten the lug nuts/bolts fully until the
vehicle has been lowered. Failure to follow this
warning may result in personal injury.

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.
TECHNICAL SPECIFICATIONS
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.
3.6L E
NGINE
Do not use E-85 flex fuel or ethanol blends
greater than 15% in this engine.
This engine is designed to meet all
emissions regulations and provide
optimum fuel economy and performance
when using high quality unleaded
"Regular" gasoline having a posted octane number
of 87 as specified by the (R+M)/2 method. The use
of higher octane "Premium" gasoline is not
required, as it will not provide any benefit over
"Regular" gasoline in these engines.
5.7L E
NGINE
Do not use E-85 flex fuel or ethanol blends
greater than 15% in this engine.
This engine is designed to meet all
emissions regulations and provide
satisfactory fuel economy and
performance when using high-quality
unleaded gasoline having an octane range of
87 to 89 as specified by the (R+M)/2 method.
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