2020 DODGE DURANGO Owners Manual

SERVICING AND MAINTENANCE303
(Continued)
Replace the spark plugs. 1X
Flush and replace the engine
coolant at 120 months if not
done at 150,000 miles
(240,000 km). X
X
1. The spark plug change interval is mileage based only, monthly intervals do not apply.
Miles:6,000
12,000
18,000
24,000
30,000
36,000
42,000
48,000
54,000
60,000
66,000
72,000
78,000
84,000
90,000
96,000
102,000
108,000
114,000
120,000
126,000
132,000
138,000
144,000
150,000
Or Months: 6 1
21
82
43
03
64
24
85
46
06
67
27
88
49
09
61
0
21
0
81
1
41
2
01
2
61
3
21
3
81
4
41
5
0
Or Kilometers:
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
160,000
170,000
180,000
190,000
200,000
210,000
220,000
230,000
240,000
250,000
WARNING!
You can be badly injured working on or
around a motor vehicle. Do only 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.Failure to properly inspect and maintain
your vehicle could result in a component
malfunction and effect vehicle handling
and performance. This could cause an acci -
dent.
WARNING! (Continued)
7

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304SERVICING AND MAINTENANCE
ENGINE COMPARTMENT
3.6L ENGINE
1 — Remote Jump Start Positive Terminal 6 — Engine Air Cleaner Filter
2 — Power Distribution Center (Fuses) 7 — Washer Fluid Reservoir Cap
3 — Engine Oil Dipstick 8 — Engine Coolant Pressure Cap
4 — Engine Oil Fill 9 — Remote Jump Start Negative Terminal
5 — Brake Fluid Reservoir Cap

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SERVICING AND MAINTENANCE305
5.7L ENGINE
1 — Remote Jump Start Negative Terminal 6 — Engine Air Cleaner Filter
2 — Remote Jump Start Positive Terminal 7 — Washer Fluid Reservoir Cap
3 — Power Distribution Center (Fuses) 8 — Engine Oil Dipstick
4 — Engine Oil Fill 9 — Engine Coolant Pressure Cap
5 — Brake Fluid Reservoir Cap 10 — Engine Coolant Reservoir Cap
7

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306SERVICING AND MAINTENANCE
6.4L ENGINE
1 — Remote Jump Start Positive Terminal 6 — Washer Fluid Reservoir Cap
2 — Power Distribution Center (Fuses) 7 — Engine Oil Dipstick
3 — Engine Oil Fill 8 — Engine Coolant Pressure Cap
4 — Engine Air Cleaner Filter 9 — Engine Coolant Reservoir Cap
5 — Brake Fluid Reservoir Cap 10 — Remote Jump Start Negative Terminal

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SERVICING AND MAINTENANCE307
(Continued)
CHECKING OIL LEVEL
To ensure proper lubrication of your vehicle's
engine, the engine oil must be maintained at
the correct level. Check the oil level at regular
intervals, such as every fuel stop. The best time
to check the engine oil level is about five
minutes after a fully warmed up engine is shut
off.
Checking the oil while the vehicle is on level
ground will improve the accuracy of the oil level
readings. Always maintain the oil level within
the SAFE zone on the dipstick. Adding one quart
of oil when the reading is at the bottom of the
SAFE zone will result in a reading at the top of
the safe zone on these engines.
ADDING WASHER FLUID
The instrument cluster display will indicate
when the washer fluid level is low. When the
sensor detects a low fluid level, the windshield
will light on the vehicle graphic outline and the
“WASHER FLUID LOW” message will be
displayed.
The fluid reservoir for the windshield washers
and the rear window washer is shared. The fluid
reservoir is located in the engine compartment,
be sure to check the fluid level at regular
intervals. Fill the reservoir with windshield
washer solvent only (not radiator antifreeze).
When refilling the washer fluid reservoir, take
some washer fluid and apply it to a cloth or
towel and wipe clean the wiper blades, this will
help blade performance. To prevent freeze-up
of your windshield washer system in cold
weather, select a solution or mixture that meets
or exceeds the temperature range of your
climate. This rating information can be found on
most washer fluid containers.
MAINTENANCE-FREE BATTERY
Your vehicle is equipped with a
maintenance-free battery. Water will never have
to be added, nor is periodic maintenance
required.
CAUTION!
Overfilling or underfilling will cause oil
aeration or loss of oil pressure. This could
damage your engine.
WARNING!
Commercially available windshield washer
solvents are flammable. They could ignite and
burn you. Care must be exercised when filling
or working around the washer solution.
WARNING!
Battery fluid is a corrosive acid solution and
can burn or even blind you. Do not allow
battery fluid to contact your eyes, skin, or
clothing. Do not lean over a battery when
attaching clamps. If acid splashes in eyes
or on skin, flush the area immediately with
large amounts of water. Refer to “Jump
Starting Procedure” in “In Case Of Emer -
gency” for further information.
7

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308SERVICING AND MAINTENANCE
PRESSURE WASHING
Cleaning the engine compartment with a high
pressure washer is not recommended.
DEALER SERVICE
An authorized dealer has the qualified service
personnel, special tools, and equipment to
perform all service operations in an expert
manner. Service Manuals are available which
include detailed service information for your
vehicle. Refer to these Service Manuals before
attempting any procedure yourself.
NOTE:
Intentional tampering with emissions control
systems may void your warranty and could
result in civil penalties being assessed against
you.
ENGINE OIL
Change Engine Oil — Non-SRT (If Equipped)
The oil change indicator system will remind you
that it is time to take your vehicle in for
scheduled maintenance. Refer to the
“Maintenance Plan” for further information.
NOTE:
Under no circumstances should oil change
intervals exceed 10,000 miles (16,000 km),
12 months or 350 hours of engine run time,
whichever comes first. The 350 hours of engine
run or idle time is generally only a concern for
fleet customers.
Battery gas is flammable and explosive.
Keep flame or sparks away from the
battery. Do not use a booster battery or any
other booster source with an output greater
than 12 Volts. Do not allow cable clamps to
touch each other.
Battery posts, terminals, and related acces -
sories contain lead and lead compounds.
Wash hands after handling.
CAUTION!
It is essential when replacing the cables on
the battery that the positive cable is
attached to the positive post and the nega -
tive cable is attached to the negative post.
Battery posts are marked positive (+) and
negative (-) and are identified on the battery
case. Cable clamps should be tight on the
terminal posts and free of corrosion.
If a “fast charger” is used while the battery
is in the vehicle, disconnect both vehicle
battery cables before connecting the
charger to the battery. Do not use a “fast
charger” to provide starting voltage.
WARNING! (Continued)
CAUTION!
Precautions have been taken to safeguard all
parts and connections however, the
pressures generated by these machines is
such that complete protection against water
ingress cannot be guaranteed.
WARNING!
You can be badly injured working on or
around a motor vehicle. Only do service work
for which you have the knowledge and the
proper equipment. If you have any doubt
about your ability to perform a service job,
take your vehicle to a competent mechanic.

20_WD_OM_EN_USC_t.book Page 308

SERVICING AND MAINTENANCE309
Change Engine Oil — SRT (If Equipped)
The oil change indicator system will remind you
that it is time to take your vehicle in for
scheduled maintenance. Refer to “Scheduled
Servicing” for further information.
NOTE:
Under no circumstances should oil change
intervals exceed 6,000 miles (10,000 km) or
6 months, whichever occurs first.
Engine Oil Selection — Non-SRT (If
Equipped)
For best performance and maximum protection
under all types of operating conditions, the
manufacturer only recommends engine oils
that are API Certified and meet the
requirements of FCA Material Standard
MS-6395.
NOTE:
Hemi engines (5.7L) at times can tick right after
startup and then quiet down after approxi -
mately 30 seconds. This is normal and will not
harm the engine. This characteristic can be
caused by short drive cycles. For example, if the
vehicle is started then shut off after driving a
short distance. Upon restarting, you may experience a ticking
sound. Other causes could be if the vehicle is
unused for an extended period of time, incor
-
rect oil, extended oil changes or extended
idling. If the engine continues to tick or if the
Malfunction Indicator Light (MIL) comes on, see
the nearest authorized dealer.
Engine Oil Selection — SRT (If Equipped)
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 engine or equivalent
Mopar oil meeting the FCA Material Standard
MS-12633 for use in all operating
temperatures.
The engine oil filler cap also shows the
recommended engine oil viscosity for your
engine. For information on engine oil filler cap
location, refer to “Engine Compartment” in this
section for further information. NOTE:
Hemi engines at times can tick right after
startup and then quiet down after approxi
-
mately 30 seconds. This is normal and will not
harm the engine. This characteristic can be
caused by short drive cycles. For example, if the
vehicle is started then shut off after driving a
short distance. Upon restarting, you may experi -
ence a ticking sound. Other causes could be if
the vehicle is unused for an extended period of
time, incorrect oil, extended oil changes or
extended idling. If the engine continues to tick
or if the Malfunction Indicator Light (MIL) comes
on, see the nearest authorized dealer.
CAUTION!
Do not use chemical flushes in your engine oil
as the chemicals can damage your engine.
Such damage is not covered by the New
Vehicle Limited Warranty.7

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310SERVICING AND MAINTENANCE
American Petroleum Institute (API) Engine
Oil Identification Symbol
This symbol means that the oil has
been certified by the American
Petroleum Institute (API). The
manufacturer only recommends API
Certified engine oils.
This symbol certifies 0W-20, 5W-20, 0W-30,
5W-30 and 10W-30 engine oils.
Engine Oil Viscosity (SAE Grade) — 3.6L
Engine
Mopar SAE 0W-20 engine oil approved to FCA
Material Standard MS-6395 such as Pennzoil,
Shell Helix or equivalent is recommended for all
operating temperatures. This engine oil
improves low temperature starting and vehicle
fuel economy. The engine oil filler cap also shows the
recommended engine oil viscosity for your
engine. For information on engine oil filler cap
location, refer to the “Engine Compartment”
illustration in this section.
Lubricants which do not have both the engine
oil certification mark and the correct SAE
viscosity grade number should not be used.
Engine Oil Viscosity (SAE Grade) — 5.7L
Engine
Mopar SAE 5W-20 engine oil approved to FCA
Material Standard MS-6395 such as Pennzoil,
Shell Helix or equivalent is recommended for all
operating temperatures. This engine oil
improves low temperature starting and vehicle
fuel economy.
The engine oil filler cap also shows the
recommended engine oil viscosity for your
engine. For information on engine oil filler cap
location, refer to the “Engine Compartment”
illustration in this section.
NOTE:
Vehicles equipped with a 5.7L engine must use
SAE 5W-20 oil. Failure to do so may result in
improper operation of the Fuel Saver Tech
-
nology. Refer to “Fuel Saver Technology – If
Equipped” in “Starting And Operating” for
further information.
Lubricants which do not have both the engine
oil certification mark and the correct SAE
viscosity grade number should not be used.Engine Oil Viscosity — 6.4L Engine
Use Pennzoil Ultra Platinum 0W-40 engine or
equivalent Mopar oil meeting the FCA Material
Standard MS-12633 for use in all operating
temperatures.
The engine oil filler cap also shows the
recommended engine oil viscosity for your
engine. For information on engine oil filler cap
location, refer to “Engine Compartment” in this
section for further information.
CAUTION!
Do not use chemical flushes in your engine oil
as the chemicals can damage your engine.
Such damage is not covered by the New
Vehicle Limited Warranty.

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