5.7L Engines (If Equipped)
The 5.7L engine is designed to meet all
emissions regulations and provide satisfac-
tory fuel economy and performance when
using high quality unleaded gasoline hav-
ing an octane range of 87 to 89. The manu-
facturer recommends the use of 89 octane
for optimum performance. The use of premium gasoline
is not recommended. Under normal conditions, the use of
premium gasoline will not provide a benefit over high
quality regular and mid-grade gasolines, and in some
circumstances may result in poorer performance.
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 as hard
starting, stalling and hesitations. If you experience these
symptoms, try another brand of gasoline before consid-
ering service for the vehicle.
Over 40 auto manufacturer’s world wide have issued and
endorsed consistent gasoline specifications (the World-
wide Fuel Charter, WWFC) to define fuel properties
necessary to deliver enhanced emissions, performance,
and durability for your vehicle. The manufacturer recom-
mends the use of gasoline that meets the WWFC speci-
fications if they are available.
Reformulated Gasoline
Many areas of the country require the use of cleaner
burning gasoline referred to as “Reformulated Gasoline.”
Reformulated gasoline contains oxygenates, and are spe-
cifically blended to reduce vehicle emissions and im-
prove air quality.
STARTING AND OPERATING
337
5
Summary of Contents for 2008 Grand Cherokee
Page 2: ......
Page 7: ...INTRODUCTION 7 1...
Page 10: ......
Page 103: ...UNDERSTANDING THE FEATURES OF YOUR VEHICLE 103 3...
Page 104: ...104 UNDERSTANDING THE FEATURES OF YOUR VEHICLE...
Page 105: ...UNDERSTANDING THE FEATURES OF YOUR VEHICLE 105 3...
Page 186: ...INSTRUMENT CLUSTER Gasoline Engine 186 UNDERSTANDING YOUR INSTRUMENT PANEL...
Page 187: ...Diesel Engine UNDERSTANDING YOUR INSTRUMENT PANEL 187 4...
Page 255: ...Lowering the DVD Screen Remote Control Location UNDERSTANDING YOUR INSTRUMENT PANEL 255 4...
Page 265: ...UNDERSTANDING YOUR INSTRUMENT PANEL 265 4...
Page 270: ...Operating Tips Chart 270 UNDERSTANDING YOUR INSTRUMENT PANEL...
Page 317: ...STARTING AND OPERATING 317 5...
Page 386: ...ENGINE COMPARTMENT 3 7L 386 MAINTAINING YOUR VEHICLE...
Page 387: ...ENGINE COMPARTMENT 4 7L MAINTAINING YOUR VEHICLE 387 7...
Page 388: ...ENGINE COMPARTMENT 5 7L 388 MAINTAINING YOUR VEHICLE...
Page 389: ...ENGINE COMPARTMENT 3 0L DIESEL MAINTAINING YOUR VEHICLE 389 7...
Page 468: ......
Page 469: ...INDEX 10...