2021 RAM CHASSIS CAB octane

TECHNICAL SPECIFICATIONS433

8/10 Lug Nuts/Bolts Torque Patterns

It is recommended that wheel stud nuts be kept
torqued to specifications at all times. Torque
wheel stud nuts to specifications at each
lubrication interval.

All wheel nuts should be tightened occasionally
to eliminate the possibility of wheel studs being
sheared or the bolt holes in the wheels becoming
elongated. This is especially important during the
first few hundred miles/kilometers of operation
to allow the wheel nuts to become properly set.
All wheel nuts should first be firmly seated
against the wheel. The wheel nuts should then be
tightened to recommended torque. Tighten the wheel nuts to final torque in increments.
Progress around the bolt circle, tightening the
wheel nut opposite to the wheel nut just
previously tightened until final torque is
achieved.

FUEL REQUIREMENTS — GASOLINE ENGINE
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 or not be covered by the New Vehicle
Limited Warranty.

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.

6.4L ENGINE
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 a posted octane number
of 87 as specified by the (R+M)/2 method.

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
specifically blended to reduce vehicle
emissions and improve air quality.
The use of reformulated gasoline is
recommended. Properly blended reformulated
gasoline will provide improved performance
and durability of engine and fuel system
components.
1 — 10 Bolt Pattern
2 — 8 Bolt Pattern
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.

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434TECHNICAL SPECIFICATIONS
MATERIALS ADDED TO FUEL
Besides using unleaded gasoline with the
proper octane rating, gasolines that contain
detergents, corrosion and stability additives are
recommended. Using gasolines that have these
additives will help improve fuel economy,
reduce emissions, and maintain vehicle
performance.
Designated TOP TIER Detergent
Gasoline contains a higher level
of detergents to further aide in
minimizing engine and fuel system
deposits. When available, the usage of TOP
TIER Detergent Gasoline is recommended. Visit
www.toptiergas.com for a list of TOP TIER
Detergent Gasoline Retailers.
Indiscriminate use of fuel system cleaning
agents should be avoided. Many of these
materials intended for gum and varnish
removal may contain active solvents or similar
ingredients. These can harm fuel system gasket
and diaphragm materials.
GASOLINE/OXYGENATE BLENDS
Some fuel suppliers blend unleaded gasoline
with oxygenates such as ethanol.
Problems that result from using gasoline
containing more than 15% ethanol (E-15) or
gasoline containing methanol are not the
responsibility of the manufacturer and may void
or not be covered under New Vehicle Limited
Warranty.
DO NOT USE E-85 IN NON-FLEX FUEL
V
EHICLES
Non-Flex Fuel Vehicles (FFV) are compatible
with gasoline containing up to 15% ethanol
(E-15). Use of gasoline with higher ethanol
content may void the New Vehicle Limited
Warranty.
If a Non-FFV vehicle is inadvertently fueled with
E-85 fuel, the engine will have some or all of
these symptoms:
Operate in a lean mode.
OBD II Malfunction Indicator Light on.
Poor engine performance.
Poor cold start and cold drivability.
Increased risk for fuel system component
corrosion.
CAUTION!
DO NOT use E-85, gasoline containing
methanol, or gasoline containing more than
15% ethanol (E-15). Use of these blends may
result in starting and drivability problems,
damage critical fuel system components,
cause emissions to exceed the applicable
standard, and/or cause the Malfunction
Indicator Light to illuminate. Please observe
pump labels as they should clearly
communicate if a fuel contains greater than
15% ethanol (E-15).

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TECHNICAL SPECIFICATIONS435
(Continued)
CNG AND LP FUEL SYSTEM
M
ODIFICATIONS

Modifications that allow the engine to run on
Compressed Natural Gas (CNG) or Liquid
Propane (LP) may result in damage to the engine,
emissions, and fuel system components.
Problems that result from running CNG or LP are
not the responsibility of the manufacturer and
may void or not be covered under the New
Vehicle Limited Warranty.

METHYLCYCLOPENTADIENYL
M
ANGANESE TRICARBONYL (MMT) IN
G
ASOLINE

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. MMT is prohibited in
Federal and California reformulated gasoline.

FUEL SYSTEM CAUTIONS
NOTE:
Intentional tampering with the emissions
control system can result in civil penalties being
assessed against you.
CAUTION!
Follow these guidelines to maintain your
vehicle’s performance:
The use of leaded gasoline is prohibited by
Federal law. Using leaded gasoline can
impair engine performance and damage
the emissions control system.
An out-of-tune engine or certain fuel or igni
-
tion 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 malfunc -
tioning and may require immediate service.
Contact an authorized dealer for service
assistance.
The use of fuel additives, which are now
being sold as octane enhancers, is not
recommended. Most of these products
contain high concentrations of methanol.
Fuel system damage or vehicle perfor -
mance problems resulting from the use of
such fuels or additives is not the responsi -
bility of the manufacturer and may void or
not be covered under the New Vehicle
Limited Warranty.
CAUTION! (Continued)
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440TECHNICAL SPECIFICATIONS
ENGINE FLUIDS AND LUBRICANTS
6.4L GASOLINE ENGINE
Cooling System
6.7L Engine Chassis Cab 3500/4500 with AS69RC 22.3 Quarts21.1 Liters
6.7L Engine Chassis Cab 5500 with AS69RC 22.8 Quarts21.6 Liters
USMetric
Component Fluid, Lubricant, or Genuine Part
Engine CoolantWe recommend you use Mopar Antifreeze/Coolant 10–Year/150,000 Mile (240,000 km)
Formula OAT (Organic Additive Technology).
Engine Oil – 6.4L Engine 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 SN. The manufacturer recommends the use of Pennzoil Ultra
0W-40 or equivalent Mopar engine oil meeting the requirements of FCA Material Standard
MS-12633 for use in all operating temperatures.
Engine Oil Filter – 6.4L Engine We recommend you use a Mopar Engine Oil Filter. If a Mopar Engine Oil Filter is unavailable
only use filters that meet or exceed SAE/USCAR-36 Filter Performance Requirements.
Fuel Selection – 6.4L Engine 87 Octane (R+M)/2 Method, 0-15% Ethanol (Do not use E-85).

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453
Fluid Level Checks Brake
........................................................ 387Power Steering.......................................... 163Fog Lights............................................... 53, 404Fold Flat Load Floor......................................... 70Fold-Flat Seats................................................. 33Forward Collision Warning............................. 281Four Wheel Drive........................................... 153Four-Way Hazard Flasher............................... 334Freeing A Stuck Vehicle................................. 349Front Axle (Differential).................................. 390Fuel............................................ 196, 433, 436Adding....................................................... 195Additives................................................... 434Clean Air.................................................... 433Diesel.............................................. 196, 436Ethanol...................................................... 434Filler Cap (Gas Cap)................................... 196Filter................................................ 375, 440Gasoline.................................................... 433Light.......................................................... 111Materials Added........................................ 434Methanol................................................... 434Octane Rating........................................... 433Requirements................................. 433, 436Specifications............................................ 436Tank Capacity............................................ 439Fuses............................................................. 394
G
Garage Door Opener (HomeLink)..................... 47Gas Cap (Fuel Filler Cap).............................. 196Gasoline, Clean Air........................................ 433Gasoline, Reformulated................................ 433GaugesVoltage..................................................... 128Gear Ranges................................................. 147Gear Selector Override................................. 347Glass Cleaning.............................................. 430Gross Axle Weight Rating.............................. 201Gross Vehicle Weight Rating......................... 201GuideBody Builders.............................................. 10GVWR............................................................ 199
H
HazardDriving Through Flowing, Rising, Or Shallow Standing Water
.................................... 218Hazard Warning Flashers.............................. 334Head Restraints............................................... 38Head Rests...................................................... 38Headlights.................................................... 402Automatic High Beam.................................. 52Cleaning................................................... 427High Beam................................................... 51Lights On Reminder..................................... 53Passing........................................................ 52Switch.......................................................... 50
Heated Mirrors.................................................46Heated Seats...................................................37Hill Descent Control...................................... 278Hill Descent Control Indicator....................... 278Hill Start Assist.............................................. 280HitchesTrailer Towing........................................... 204HomeLink (Garage Door Opener).....................47Hood Prop........................................................79Hood Release...................................................79Hub Caps...................................................... 343
I
Idle-Up Feature............................................. 132Ignition.............................................................18Switch..........................................................18Illuminated Entry..............................................56Inside Rearview Mirror.................... 41, 42, 335Instrument Cluster...................... 85, 86, 88, 89Descriptions.............................................. 115Display.........................................................90Engine Oil Reset..........................................91Instrument Panel Lens Cleaning................... 429Integrated Trailer Brake Control.................... 207Interior Appearance Care.............................. 428Interior Lights...................................................55Intermittent Wipers (Delay Wipers)..................57Intervention Regeneration Strategy..... 101, 379Inverter Outlet (115V)......................................74
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455
Manual Park Release
............................................. 348Service...................................................... 448Media Hub....................................................... 72Media Mode.................................................. 255Memory Seat................................................... 32Memory Settings............................................. 32Methanol....................................................... 434Mirrors............................................................. 41Electric Powered......................................... 44Heated........................................................ 46Memory....................................................... 32Outside........................................................ 44Rearview..................................... 41, 42, 335Trailer Towing.............................................. 46Modifications/AlterationsVehicle........................................................ 10Monitor, Tire Pressure System....................... 284Mopar Parts................................................... 447MP3 Control.................................................... 72Multi-Function Control Lever............................ 51
N
Navigation System (Uconnect GPS)............... 186New Vehicle Break-In Period................ 136, 137Noise ControlMaintenance............................................. 391Tampering Prohibited................................ 392Noise Emission Warranty..................... 391, 392
O
Occupant Restraints..................................... 292Octane Rating, Gasoline (Fuel)..................... 433Oil Change Indicator..................................... 357Oil Filter, Change.......................................... 369Oil Filter, Selection........................................ 369Oil Pressure Light.......................................... 108Oil Reset.......................................................... 91Oil, Engine............................................ 368, 440Capacity.................................................... 439Dipstick.................................................... 366Disposal................................................... 369Filter................................................ 369, 440Filter Disposal........................................... 369Identification Logo.................................... 368Materials Added To.................................. 368Pressure Warning Light............................ 108Recommendation..................................... 368Synthetic.................................................. 368Onboard Diagnostic System.......................... 116Operating Precautions.................................. 116Operator ManualOwner's Manual........................................ 448Outside Rearview Mirrors................................ 44Overdrive...................................................... 151Overdrive OFF Switch.................................... 151Overheating, Engine...................................... 346
P
Paint Care..................................................... 427Pair (Link) Uconnect Phone To A Mobile
Phone .................................................... 260Parking Brake............................................... 137ParkSense System, Rear............................... 177Passive Entry....................................................26Pedals, Adjustable...........................................40Pets............................................................... 330Phone Mode.................................................. 258Placard, Tire And Loading Information.......... 411Power
Distribution Center (Fuses)....................... 395Door Locks...................................................25Mirrors.........................................................44Outlet (Auxiliary Electrical Outlet)..........73, 74Seats...........................................................35Sliding Rear Window....................................78Steering............................................. 44, 163Take-Off Adapter....................................... 163Take-Off Operation.................................... 163Windows......................................................76Power SeatsDown...........................................................35Forward.......................................................35Rearward.....................................................35Recline.........................................................35Tilt................................................................35Up................................................................35
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