2008 CHRYSLER 300 SRT spark plug

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. Gasoline
blended with MMT provides no performance advantage
beyond gasoline of the same octane number without
MMT. Gasoline blended with MMT reduces spark plug
life and reduces emissions system performance in some
vehicles. The manufacturer recommends that gasoline
without MMT be used in your vehicle. The MMT content
of gasoline may not be indicated on the gasoline pump,
therefore, you should ask your gasoline retailer whether
the gasoline contains MMT. It is even more important to
look for gasoline without MMT in Canada, because MMTcan be used at levels higher than those allowed in the
United States. MMT is prohibited in Federal and Califor-
nia reformulated gasoline.
Materials Added to Fuel
All gasoline sold in the United States is required to
contain effective detergent additives. Use of additional
detergents or other additives is not needed under normal
conditions and they would result in additional cost.
Therefore, 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 359
5

MAINTAINING YOUR VEHICLE
CONTENTS

6.1L Engine Compartment................386

Onboard Diagnostic System — OBD II........387
▫Loose Fuel Filler Cap..................387

Emissions Inspection And Maintenance
Programs............................388

Replacement Parts......................389

Authorized Dealer Service................390

Maintenance Procedures..................390
▫Engine Oil..........................391▫Engine Oil Filter......................393
▫Drive Belts — Check Condition And Tension . . 393
▫Spark Plugs.........................394
▫Engine Air Cleaner Filter................394
▫Fuel Filter..........................395
▫Catalytic Converter....................395
▫Maintenance-Free Battery................397
▫Air Conditioner Maintenance.............399
▫A/C Air Filter — If Equipped............400
7

Inspect belts for evidence of cuts, cracks, glazing, or
frayed cords and replace if there is indication of damage
that could result in belt failure. Also, check belt routing to
make sure there is no interference between the belts and
other engine components. See your authorized dealer for
service.
Spark Plugs
Spark plugs must fire properly to assure engine perfor-
mance and emissions control. New plugs should be
installed at the specified mileage. The entire set should be
replaced if there is any malfunction due to a faulty spark
plug. Malfunctioning spark plugs can damage the cata-
lytic converter. Refer to “Fluids, Lubricants, and Genuine
Parts” in this section for the proper type of spark plug for
use in your vehicle.
Engine Air Cleaner Filter
Refer to the Maintenance Schedule in Section 8 for engine
air cleaner filter maintenance intervals.
NOTE:Be sure to follow the “dusty or off-road condi-
tions” maintenance interval if applicable.
WARNING!
The air induction system (air cleaner, hoses, etc) can
provide a measure of protection in the case of engine
backfire. Do not remove the air induction system (air
cleaner, hoses, etc) unless such removal is necessary
for repair or maintenance. Make sure that no one is
near the engine compartment before starting the
vehicle with the air induction system (air cleaner,
hoses, etc) removed. Failure to do so can result in
serious personal injury.
394 MAINTAINING YOUR VEHICLE

WARNING!
A hot exhaust system can start a fire if you park over
materials that can burn. Such materials might be
grass or leaves coming into contact with your exhaust
system. Do not park or operate your vehicle in areas
where your exhaust system can contact anything that
can burn.
In unusual situations involving grossly malfunctioning
engine operation, a scorching odor may indicate severe
and abnormal catalyst overheating. If this should occur,
safely bring the vehicle to a complete stop, shut the
engine OFF, and allow the vehicle to cool. Thereafter,
obtain service, including a tune-up to manufacturer’s
specifications immediately.To minimize the possibility of catalyst damage:•Do not shut off the engine or interrupt the ignition
when the transmission is in gear and the vehicle is in
motion.
•Do not try to start the engine by pushing or towing the
vehicle.
•Do not idle the engine with any spark plug wires
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough
idling or malfunctioning operating conditions.
396 MAINTAINING YOUR VEHICLE

FLUIDS, LUBRICANTS, AND GENUINE PARTS
Engine
Component Fluids, Lubricants, and Genuine Parts
Engine Coolant MoparAntifreeze/Coolant 5 Year/100,000 Mile Formula HOAT (Hybrid Or-
ganic Additive Technology) or equivalent
Engine Oil (6.1L) For best performance and maximum protection under all types of operating
conditions, the manufacturer only recommends full synthetic engine oils that
meet the American Petroleum Institute (API) categories of SM or SM/CF, and
meet the requirements of DaimlerChrysler Material Standard MS-10725. The
manufacturer recommends the use of a full synthetic engine oil, such as Mo-
bil 1SAE 0W-40 or equivalent. For additional information, refer to the “En-
gine Oil Selection” and “Engine Oil Viscosity (SAE Grade)” in the “Mainte-
nance Procedures” section of this manual.
Oil Filter (6.1L) Mopar05281090 or equivalent
Spark Plugs (6.1L) PLZTR5A-13 (Gap.050 in [1.27 mm])
Fuel Selection (6.1L) Premium Unleaded 91 Octane Only or higher
436 MAINTAINING YOUR VEHICLE

Perform Maintenance Every(Where time and mileage
are listed, follow the interval that occurs first.)
Maintenance Items Miles Kilometers or Months
Inspect and replace PCV valve if necessary.90,000 150 000 90
Flush and replace the engine coolant. 102,000 170 000 60
Replace the spark plugs.102,000 170 000 102
Change the automatic transmission fluid and filter. 120,000 200 000 120
WARNING!
You can be badly injured working on or around a
motor vehicle. Do only that service work for which
you have the knowledge and the right equipment. If
you have any doubt about your ability to perform a
service job, take your vehicle to a competent
mechanic.
MAINTENANCE SCHEDULES 445
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Settings, Personal........................ 226
Shifting ............................... 301
Automatic Transmission...............301,305
Shoulder Belt Upper Anchorage.............. 44
Shoulder Belts........................... 40
Side Airbag........................... 50,57
Side Curtain (Window Airbag)............... 50
Side View Mirror Adjustment................ 85
Signals, Turn...................... 77,138,199
Slippery Surfaces, Driving On............... 312
SmartBeams........................... 134
Snow Chains (Tire Chains)................. 343
Snow Tires............................ 344
Sound Systems (Radio).................232,251
Spark Plugs.........................394,436
Specifications
Fuel (Gasoline)........................ 436
Oil ................................ 436
Speed Control (Cruise Control)...........150,153Speedometer........................... 199
Starting............................. 25,297
Automatic Transmission................. 298
Cold Weather......................... 299
Emergency (Jump Starting)............... 377
Engine Fails to Start.................... 300
Remote.............................. 25
Starting and Operating.................... 297
Starting Procedures...................... 297
Steering
Column Controls...................... 137
Linkage............................. 401
Power...........................319,400
TiltColumn .......................... 147
Wheel, Tilt........................... 147
Steering Wheel Mounted Sound System
Controls.............................. 281
Storage............................190,427
Storage, Vehicle......................290,427
474 INDEX