2008 DODGE RAM 5500 CHASSIS CAB octane

ENGINE RUNAWAY
WARNING!
In case of engine runaway due to flammable fumes
from gasoline spills or turbocharger oil leaks being
sucked into the engine do the following to help avoid
personal injury and/or vehicle damage:
1. Shut off engine ignition switch.
2. Using a CO
2or dry chemical type fire extin-
guisher, direct the spray from the fire extinguisher
into the grille on the passenger side so that the spray
enters the engine air intake.
The inlet for the engine air intake is located behind
the passenger side headlamp and receives air
through the grille
FUEL REQUIREMENTS
Fuel Requirements (5.7L Gas Engines)
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 routine use of premium
gasoline is not recommended. The use of premium
gasoline will provide no 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.
STARTING AND OPERATING 337
5

Problems that result from using methanol/gasoline or
E85 Ethanol blends are not the responsibility of the
manufacturer. While MTBE is an oxygenate made from
Methanol, it does not have the negative effects of Metha-
nol.
MMT In Gasoline
MMT is a manganese-containing metallic additive that is
blended into some gasoline to increase octane. Gasolines
blended with MMT provide no performance advantage
beyond gasolines of the same octane number without
MMT. Gasolines blended with MMT reduce spark plug
life and reduce emission system performance. We recom-
mend that gasolines free of MMT be used in your vehicle.
The MMT content of gasoline may not be indicated on
the gasoline pump; therefore, you should ask your gaso-
line retailer whether or not his/her gasoline contains
MMT.It is even more important to look for gasolines without
MMT in Canada because MMT can be used at levels
higher than allowed in the United States. MMT is pro-
hibited in Federal and California reformulated gasolines.
Materials Added To Fuel
All gasolines sold in the United States are required to
contain effective detergent additives. Use of additional
detergents or other additives is not needed under normal
conditions and would result in unnecessary cost. There-
fore, you should not have to add anything to the fuel.
Fuel System Cautions
CAUTION!
Follow these guidelines to maintain your vehicle's
performance:
STARTING AND OPERATING 339
5

²The use of leaded gas is prohibited by Federal law.
Using leaded gasoline can impair engine performance,
damage the emission control system.
²An out-of-tune engine, or certain fuel or ignition
malfunctions, can cause the catalytic converter to
overheat. If you notice a pungent burning odor or
some light smoke, your engine may be out of tune or
malfunctioning and may require immediate service.
Contact your dealer for service assistance.
²When pulling a heavy load or driving a fully loaded
vehicle when the humidity is low and the temperature
is high, use a premium unleaded fuel to help prevent
spark knock. If spark knock persists, lighten the load,
or engine piston damage may result.
²The use of fuel additives which are now being sold as
octane enhancers is not recommended. Many of these
products contain high concentrations of methanol.Fuel system damage or vehicle performance problems
resulting from the use of such fuels or additives is not
the responsibility of the manufacturer.
NOTE:Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you.
Carbon Monoxide Warnings
WARNING!
Carbon monoxide (CO) in exhaust gases is deadly.
Follow the precautions below to prevent carbon
monoxide poisoning:
²Do not inhale exhaust gases. They contain carbon
monoxide, a colorless and odorless gas which can kill.
Never run the engine in a closed area, such as a
garage, and never sit in a parked vehicle with the
340 STARTING AND OPERATING

Component Fluids, Lubricants and Genuine Parts
Crankcase Ventilation Filter (6.7L Diesel
Engine
)
MopartCCV Filter, P/N 68001433AA or equivalent.
Fuel Selection (5.7L Gas Engine
)89 Octane, (R+M)/2 Method, Mid-Grade Preferred (87 Octane acceptable).
Fuel Selection (6.7L Diesel Engine
)Use good quality diesel fuel from a reputable supplier in your vehicle.
Federal law requires that you must fuel this vehicle with Ultra Low Sulfur
Highway Diesel fuel (15 ppm Sulfur maximum) and prohibits the use of
Low Sulfur Highway Diesel fuel (500 ppm Sulfur maximum) to avoid
damage to the emissions control system. For most year-round service, No.
2 diesel fuel meeting ASTM specification D-975 Grade S15 will provide
good performance. If the vehicle is exposed to extreme cold (below 20ÉF
or -7ÉC), or is required to operate at colder-than-normal conditions for
prolonged periods, use climatized No. 2 diesel fuel or dilute the No. 2
diesel fuel with 50% No. 1 diesel fuel. This will provide better protection
from fuel gelling or wax-plugging of the fuel filters.This vehicle is fully
compatible with biodiesel blends up to 5% biodiesel meeting ASTM
specification D-975.
Spark Plugs (5.7L Engine) REC14MCC4 (Gap 0.043º)
MAINTAINING YOUR VEHICLE 477
7

Fabric Care............................ 459
Fan .................................. 439
Filters
Air Cleaner.......................... 413
Engine Fuel.....................417,420,476
Engine Oil.....................406,410,476
Flashers
Turn Signal.......................... 126
Flat Tire Stowage........................ 389
Flooded Engine Starting................... 253
Fluid, Brake........................... 478
Fluid Capacities......................... 474
Fluid Level Checks
Brake............................... 442
Manual Transmission................... 445
Power Steering........................ 428
Transfer Case......................... 445
Fluids, Lubricants and Genuine Parts.......... 476
Fog Lights.......................125,179,472Fold Flat Load Floor..................... 163
Four Wheel Drive....................... 289
Four-Way Hazard Flasher.................. 378
Freeing A Stuck Vehicle................... 393
Front Axle (Differential)................430,443
Front Wheel Bearings..................... 451
Fuel............................337,341,345
Adding..........................343,345
Diesel.........................341,345,476
Filter.........................417,420,476
Gauge.............................. 183
Hoses.............................. 440
Light............................... 183
Octane Rating........................ 337
Requirements......................337,341
Specifications......................... 342
System Hoses......................... 440
Tank Capacity........................ 474
Fuses................................ 462
INDEX 515
10

Tampering Prohibited................... 453
Noise Emission Warranty...............451,454
Occupant Restraints....................... 35
Octane Rating, Gasoline (Fuel).............. 337
Odometer..........................177,182
Trip .............................177,182
Off-Pavement Driving (Off-Road)............ 307
Off-Road Driving (Off-Pavement)............ 307
Oil Change Indicator................145,178,482
Oil, Engine............................ 476
Capacity............................ 474
Change Interval....................407,409
Dipstick............................. 406
Disposal............................ 412
Filter.........................406,410,476
Identification Logo..................408,409
Materials Added to..................... 410
Pressure Gauge....................... 176Recommendation...................408,409
Synthetic............................ 410
Viscosity..........................408,410
Oil Filter, Change........................ 410
Onboard Diagnostic System................ 402
Operating Precautions.................... 402
Outside Rearview Mirrors.................. 82
Overdrive..........................276,282
Overdrive OFF Switch.................276,282
Overhead Console....................135,142
Overhead Travel Information Center.......... 135
Owner's Manual (Operator Manual).......... 504
Panic Alarm............................ 24
Parking Brake.......................... 308
Passenger Airbag On/Off Switch............. 52
Passing Light........................... 127
Pedals, Adjustable....................... 131
Personal Settings........................ 146
520 INDEX