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Fuel requirements, 7l and 4.7l engine, 7l engine – Dodge 2011 Ram User Manual

Page 445

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• This device may not cause harmful interference.
• This device must accept any interference received,

including interference that may cause undesired
operation.

The TPM sensors are regulated under one of the follow-
ing licenses:

United States . . . . . . . . . . . . . . . . . . . . . KR5S120123
Canada . . . . . . . . . . . . . . . . . . . . . . . . 2671-S120123

FUEL REQUIREMENTS

3.7L and 4.7L Engine

These engines are designed to meet all
emissions regulations and provide excel-
lent fuel economy and performance when
using high quality unleaded “regular”
gasoline having an octane rating of 87. The

use of premium gasoline is not recommended, as it will
not provide any benefit over regular gasoline in these
engines.

5.7L Engine

This engine is designed to meet all emis-
sions regulations and provide satisfactory
fuel economy and performance when us-
ing high quality unleaded gasoline having
an octane range of 87 to 89. The manufac-
turer recommends the use of 89 octane for

optimum performance. The use of premium gasoline is
not recommended, as it will not provide any benefit over
regular gasoline in these engines.

Light spark knock at low engine speeds is not harmful to
your engine. However, continued heavy spark knock at
high speeds can cause damage and immediate service is
required. Poor quality gasoline can cause problems such

5

STARTING AND OPERATING

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