2019 MAZDA MODEL 6 engine coolant

Overheating
If the temperature gauge indicates
overheating or the high engine coolant
temperature warning light turns on, the
vehicle loses power, or you hear a loud
knocking or pinging noise, the engine is
probably too hot.
WA R N I N G
Pull over to a safe location, then switch
the ignition off and make sure the fan is
not running before attempting to work
near the cooling fan:
Working near the cooling fan when it is
running is dangerous. The fan could
continue running indefinitely even if the
engine has stopped and the engine
compartment temperature is high. You
could be hit by the fan and seriously
injured.
Do not remove either cooling
system cap when the engine and radiator
are hot:
When the engine and radiator are hot,
scalding coolant and steam may shoot out
under pressure and cause serious injury.
Open the hood ONLY after steam is no
longer escaping from the engine:
Steam from an overheated engine is
dangerous. The escaping steam could
seriously burn you.
If the temperature gauge indicates
overheating or the high engine coolant
temperature warning light turns on:

1. Drive safely to the side of the road and
park off the right-of-way.
2. Put a vehicle with an automatic transaxle in park (P), a manual
transaxle in neutral.
3. Apply the parking brake.
4. Turn off the air conditioner.
5. Check whether coolant or steam is escaping from the engine
compartment.

If steam is coming from the engine
compartment:
Do not go near the front of the vehicle.
Stop the engine.
Wait until the steam dissipates, then
open the hood and start the engine.

If neither coolant nor steam is
escaping:
Open the hood and idle the engine
until it cools.
CAUTION
If the cooling fan does not operate
while the engine is running, the engine
temperature will increase. Stop the
engine and call an Authorized Mazda
Dealer.
6. Make sure the cooling fan is operating, then turn off the engine after the
temperature has decreased.
7. When cool, check the coolant level.
If Trouble Arises
Overheating
7-18
Mazda6_8HK6-EA-19A_Edition1 2018-11-15 9:36:06

If it is low, look for coolant leaks from
the radiator and hoses.

If you find a leak or other damage, or if
coolant is still leaking:
Stop the engine and call an Authorized
Mazda Dealer.
SKYACTIV-G 2.5
Cooling system cap
Coolant
reservoir
Cooling fan
SKYACTIV-G 2.5T

Cooling system cap
Coolant reservoir
Cooling fan
If you find no problems, the engine is
cool, and no leaks are obvious:
Carefully add coolant as required (page
6-26).
CAUTION
If the engine continues to overheat or
frequently overheats, have the cooling
system inspected. The engine could be
seriously damaged unless repairs are
made. Consult an Authorized Mazda
Dealer.
If Trouble Arises
Overheating
7-19
Mazda6_8HK6-EA-19A_Edition1 2018-11-15 9:36:06

SignalWarning
Charging System Warn‐
ing Indication/Warning Light If the warning light illuminates
while driving, it indicates a malfunction of the alter‐
nator or of the charging system.
Drive to the side of the road and park off the right-of-way. Co nsult an Authorized
Mazda Dealer.
CAUTION
Do not continue driving when the charging system warning light is illuminated be‐
cause the engine could stop unexpectedly.
Engine Oil Warning Light This warning light indicates
low engine oil pressure.
CAUTION
Do not run the engine if the oil pressure is low. Otherwise, it could result in extensive
engine damage.
If the light illuminates or the warning indication is displayed while driving:
1. Drive to the side of the road and park off the right-of-way o n level ground.
2. Turn off the engine and wait 5 minutes for the oil to drain back into the oil pan.
3. Inspect the engine oil level (page 6-26). If it's low, add th e appropriate amount of
engine oil while being careful not to overfill.
CAUTION
Do not run the engine if the oil level is low. Otherwise, it could result in extensive
engine damage.
4. Start the engine and check the warning light.

If the light remains illuminated even though the oil level is normal or after adding oil,
stop the engine immediately and have your vehicle towed to an Authorized Mazda
Dealer.
(Red)
High Engine Coolant
Temperature Warning
Indication/Warning
Light The light flashes when the engine coolant temperature is extrem
ely high, and illumi‐
nates when the engine coolant temperature increases further.
Handling Procedure
Flashing light
Drive slowly to reduce engine l oad until you can find a safe place to stop the vehicle
and wait for the engine to cool down.
Illuminated light
This indicates the possibility of overheating. Park the vehicle in a safe place immedi‐
ately and stop the engine.
Refer to Overheating on page 7-18.
CAUTION
Do not drive the vehicle with the high engi ne coolant temperature warning light illumi‐
nated. Otherwise, it could resu lt in damage to the engine.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
7-25
Mazda6_8HK6-EA-19A_Edition1 2018-11-15 9:36:06

Message Indicated on Display
If a message is displayed in the center display, take appropriate action (in a calm manner)
according to the displayed message.

(Display example)
▼ Stop Vehicle in Safe Place Immediately
If the following messages are dis
played in the center display , a vehicle system may be
malfunctioning. Stop the vehicle in a safe place and contact an Authorized Mazda Dealer.
Display Indicated Condition
Displays if the engine coolant temperature has increased excess ively.
Displays if the charging system has a malfunction.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
7-38
Mazda6_8HK6-EA-19A_Edition1 2018-11-15 9:36:06

DisplayContent Action to be taken
Indicates when the cancel operation is
done without depressing the brake pedal
while the vehicle is being held in the
stopped position by the AUTOHOLD
function. Cancel the AUTOHOLD function stop
hold control while depressing the brake
pedal.
Indicated when the engine coolant tem‐
perature is high or the engine is hot, and
the engine output is limited.
Drive slowly and make sure that the in‐
dication turns off.
If the indication does not turn off, con‐
sult an Authorized Mazda Dealer.
If Trouble Arises
Warning/Indicator Lights and Warning Sounds
7-41
Mazda6_8HK6-EA-19A_Edition1
2018-11-15 9:36:06

Specifications
▼Engine
Item Specification
SKYACTIV-G 2.5 SKYACTIV-G 2.5T
Type DOHC-16V in-line, 4-cylinder
Bore × Stroke 89.0 × 100 mm (3.50 × 3.94 in)
Displacement 2,488.5 ml (2,488.5 cc)
Compression ratio 13.010.5
▼Electrical System
Battery
Classification
Specification
SKYACTIV-G 2.5,
SKYACTIV-G 2.5T 12V-60Ah/20HR or 12V-65Ah/20HR
Spark-plug
Classification
Specification
SKYACTIV-G 2.5 Mazda Genuine spark plug
*1PE5R-18-110 or PE5S-18-110
SKYACTIV-G 2.5T Mazda Genuine spark plug
*1PY8V-18-110
*1 The spark plugs provide the SKY ACTIV-G its optimum performance. Consult an Authorized Mazda Dealer
for details.
CAUTION
When cleaning the iridium plugs, do not use a wire brush. The
fine particulate coating on the
iridium alloy and platinum tips could be damaged.
▼ Lubricant Quality
Lubricant
Classification
Engine oil Refer to Recommended Oil on page 6-23.
Coolant FL-22 type
Manual transaxle oil Mazda Long Life Gear Oil G7
*1
Automatic transaxle fluid Mazda Genuine ATF FZ
Brake/Clutch fluid SAE J1703 or FMVSS116 DOT-3
*1 Mazda Long Life Gear Oil G7 is superior oil for low fuel cost and optimum shift-feel. Using Mazda Long Life
Gear Oil G7 is recommended.
If Mazda Long Life Gear Oil G7 cannot be obtained, use standard oil (API Service GL-4 (SAE 75W-80)).
Specifications
Specifications
9-4
Mazda6_8HK6-EA-19A_Edition1 2018-11-15 9:36:06

NOTE
Refer to Introduction on (page 6-2) for owner's responsibility in protecting your investment.
▼Capacities
(Approximate Quantities)
Item
Capacity
Engine oil SKYACTIV-G
2.5
With oil filter replacement
4.5 L (4.8 US qt, 4.0 Imp qt)
Without oil filter replacement 4.3 L (4.5 US qt, 3.8 Imp qt)
SKYACTIV-G
2.5T With oil filter replacement
4.8 L (5.1 US qt, 4.2 Imp qt)
Without oil filter replacement 4.6 L (4.9 US qt, 4.0 Imp qt)
Coolant U.S.A. and
Canada
SKYAC‐
TIV-G 2.5Manual trans‐
axle
6.8 L (7.2 US qt, 6.0 Imp qt)
Automatic
transaxle 7.0 L (7.4 US qt, 6.2 Imp qt)/7.1 L (7.5 US qt, 6.2
Imp qt)
SKYACTIV-G 2.5T 8.3 L (8.8 US qt, 7.3 Imp qt)
Mexico SKYACTIV-G 2.5
7.1 L (7.5 US qt, 6.2 Imp qt)
SKYACTIV-G 2.5T 8.2 L (8.7 US qt, 7.2 Imp qt)
Manual transaxle oil 1.65 L (1.74 US qt, 1.45 Imp qt)
Automatic
transaxle
fluid SKYACTIV-G 2.5
7.8 L (8.2 US qt, 6.9 Imp qt)/8.0 L (8.5 US qt, 7.0
Imp qt)
SKYACTIV-G 2.5T 8.0 L (8.5 US qt, 7.0 Imp qt)
Fuel tank 62.0 L (16.4 US gal, 13.6 Imp gal)
Check oil and fluid levels with dipsticks or reservoir gauges.
▼Dimensions
Item
Vehicle specification
Overall length Without license plate holder
4,865 mm (191.5 in)
With license plate holder 4,895 mm (192.7 in)
Overall width 1,840 mm (72.4 in)
Overall height 1,450 mm (57.1 in)
Front tread 17 inch wheel vehicle
1,585 mm (62.4 in)
19 inch wheel vehicle 1,595 mm (62.8 in)
Rear tread 17 inch wheel vehicle
1,575 mm (62.0 in)
19 inch wheel vehicle 1,585 mm (62.4 in)
Wheelbase 2,830 mm (111.4 in)
Specifications
Specifications
9-5
Mazda6_8HK6-EA-19A_Edition1 2018-11-15 9:36:06

Index
Emergency TowingTiedown hooks......... ................... 7-21
Towing description...................... 7-20
Emission Control System (SKYACTIV-
G 2.5, SKYACTIV-G 2.5T).............. 3-20
Ending Screen Display.................... 4-111
Engine
Coolant.........................................6-26
Engine compartment overview.... 6-22
Exhaust gas.................................. 3-21
Hood release............................ .... 6-20
Oil................................................ 6-23
Starting...........................................4-5
Essential Information.......................... 6-2
Event Data Recorder......................... 8-22
Excessive Speed Warning................. 7-46
Exterior Care..................................... 6-54 Aluminum wheel maintenance.... 6-59
Bright-metal maint enance........... 6-58
Maintaining the finish................. 6-55
Plastic part maintenance.............. 6-59
F
Flasher Hazard warning........................... 4-85
Headlights.................................... 4-74
Flat Tire............................................... 7-3 Mounting the spare tire............... 7-11
Removing a flat tire...................... 7-7
Floor Mat.......................................... 3-40
Fluid Brake/Clutch................................ 6-28
Washer......................................... 6-28
Fluids Classification................................. 9-4
Foot Brake.........................................4-94
Forward Sensing Camera (FSC)..... 4-204
Fuel Filler lid and cap......................... 3-22
Requirements (SKYACTIV-G 2.5,
SKYACTIV-G 2.5T)....................3-19
Tank capacity.................................9-5
Fuel Consumption Display..............4-110
Fuel Economy Monitor. .................. 4-109
Control Status Display...............4-111
Ending screen display................ 4-111
Ending Screen Display.............. 4-111
Fuel consumption display.......... 4-110
Fuel Consumption Display........ 4-110
Fuses.................................................. 6-47 Panel description......................... 6-49
Replacement................................ 6-47
G
Gauges............................................... 4-12
Glove Compartment.......................... 5-93
H
Hazardous Driving............................ 3-40
Hazard Warning Flasher....................4-85
HeadlightsComing home light......................4-77
Control......................................... 4-74
Flashing....................................... 4-77
Headlight flashing....................... 4-77
High-low beam............................ 4-77
Leaving home light..................... 4-78
Leveling....................................... 4-78
Head Restraint................................... 2-17
High Beam Control System
(HBC).............................................. 4-119 High Beam Control System (HBC)
indicator light (green)................4-120
Hill Launch Assist (HLA).......... .... 4-103
HomeLink Wireless Control System
(Type A)............................................ 4-86
HomeLink Wireless Control System
(Type B)............................................ 4-89
Hood Release............. ....................... 6-20
10-4
Mazda6_8HK6-EA-19A_Edition1 2018-11-15 9:36:06