Get Before Driving -> Fuel and Emission Guide for Mazda 3 4 Door Fourth Generation (2019-2026)

Before Driving

Fuel and Emission

Fuel and Engine Exhaust Precautions

Fuel Requirements

▼

Vehicles with catalytic converters or oxygen sensors must use ONLY UNLEADED

FUEL, which will reduce exhaust emissions and keep spark plug fouling to a

minimum.

To achieve maximum engine performance, use the speciﬁed fuel.

*1

Fuel

Octane Rating (Anti-knock index)

Regular unleaded fuel

87 [(R+M)/2 method] or above (91 RON or above)

*

1

U.S. federal law requires that octane ratings be posted on gas station pumps.

Fuel with a rating lower than 87 octane (91 RON) will negatively aꢀect the emission

control system performance and could also cause engine knocking and serious

engine damage.

CAUTION

USE ONLY UNLEADED FUEL.

Leaded fuel is harmful to the catalytic converter and oxygen sensors and will lead

to deterioration of the emission control system and or failures.

This vehicle can only use oxygenated fuels containing no more than 10 % ethanol

by volume. Damage to the vehicle may occur when ethanol exceeds this

recommendation, or if the gasoline contains any methanol. Stop using gasohol of

any kind if your vehicle engine is performing poorly.

Never add fuel system additives other than a Mazda genuine product, otherwise

the emission control system could be damaged. Consult an Authorized Mazda

Dealer for details.

Gasoline blended with oxygenates such as alcohol or ether compounds are generally

referred to as oxygenated fuels. The common gasoline blend that can be used with

your vehicle is ethanol blended at no more than 10 %. Gasoline containing alcohol,

such as ethanol or methanol, may be marketed under the name "Gasohol".

Vehicle damage and drivability problems resulting from the use of the following may

not be covered by the warranty.



Gasohol containing more than 10 % ethanol.

Gasoline or gasohol containing methanol.

Leaded fuel or leaded gasohol.



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Before Driving

Fuel and Emission

NOTE

Emission Control System

▼



Under U.S. federal law, any

modiﬁcation to the

This vehicle is equipped with an

emission control system (the catalytic

converter is part of this system) that

enables the vehicle to comply with

existing exhaust emissions

original-equipment emission control

system before the ﬁrst sale and

registration of a vehicle is subject to

penalties. In some states, such

modiﬁcation made on a used vehicle

is also subject to penalties.

requirements.

WARNING



While the engine is oꢀ, the sound of

a valve opening and closing can be

heard at the rear of the vehicle,

however this does not indicate an

abnormality. The vehicle has a

self-checking device and it operates

while the engine is oꢀ.

Never park over or near anything

ﬂammable:

Parking over or near anything

ﬂammable, such as dry grass, is

dangerous. Even with the engine

turned oꢀ, the exhaust system remains

very hot after normal use and could

ignite anything ﬂammable. A resulting

ﬁre could cause serious injury or death.

Engine Exhaust (Carbon

monoxide)

▼

WARNING

CAUTION

Do not drive your vehicle if you smell

exhaust gas inside the vehicle:

Engine exhaust gas is dangerous. This

gas contains carbon monoxide (CO),

which is colorless, odorless, and

poisonous. When inhaled, it can cause

loss of consciousness and death. If you

smell exhaust gas inside the vehicle,

keep all windows fully open and

contact an Authorized Mazda Dealer

immediately.

Ignoring the following precautions

could cause lead to accumulate on the

catalyst inside the converter or cause

the converter to get very hot. Either

condition will damage the converter

and cause poor performance.

USE ONLY UNLEADED FUEL.

Do not drive your Mazda with any

sign of engine malfunction.

Do not coast with the ignition

switched oꢀ.

Do not descend steep grades in gear

with the ignition switched oꢀ.

Do not operate the engine at high

idle for more than 2 minutes.

Do not tamper with the emission

control system. All inspections and

adjustments must be made by a

qualiﬁed technician.

Do not push-start or pull-start this

vehicle.

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Before Driving

Fuel and Emission

Do not run the engine when inside an

enclosed area:

Fuel-Filler Lid and Cap

Running the engine inside an enclosed

area, such as a garage, is dangerous.

Exhaust gas, which contains poisonous

carbon monoxide, could easily enter

the cabin. Loss of consciousness or

even death could occur.

Fuel-Filler Lid and Cap

▼

WARNING

When removing the fuel-ﬁller cap,

loosen the cap slightly and wait for

any hissing to stop, then remove it:

Fuel spray is dangerous. Fuel can burn

skin and eyes and cause illness if

ingested. Fuel spray is released when

there is pressure in the fuel tank and

the fuel-ﬁller cap is removed too

quickly.

Open the windows or adjust the

heating or cooling system to draw

fresh air when idling the engine:

Exhaust gas is dangerous. When the

vehicle is stopped with the windows

closed and the engine running for a

long time even in an open area,

exhaust gas, which contains poisonous

carbon monoxide, could enter the

cabin. Loss of consciousness or even

death could occur.

Before refueling, stop the engine, and

always keep sparks and ﬂames away

from the ﬁller neck:

Fuel vapor is dangerous. It could be

ignited by sparks or ﬂames causing

serious burns and injuries.

Additionally, use of the incorrect

fuel-ﬁller cap or not using a fuel-ﬁller

cap may result in a fuel leak, which

could result in serious burns or death

in an accident.

Clear snow from underneath and

around your vehicle, particularly the

tail pipe, before starting the engine:

Running the engine when a vehicle is

stopped in deep snow is dangerous.

The exhaust pipe could be blocked by

the snow, allowing exhaust gas to

enter the cabin. Because exhaust gas

contains poisonous carbon monoxide,

it could cause loss of consciousness or

even death to occupants in the cabin.

Do not continue refueling after the

fuel pump nozzle shuts oꢀ

automatically:

Continuing to add fuel after the fuel

pump nozzle has shut oꢀ automatically

is dangerous because overﬁlling the

fuel tank may cause fuel overﬂow or

leakage. Fuel overﬂow and leakage

could damage the vehicle and if the

fuel ignites it could cause a ﬁre and

explosion resulting in serious injury or

death.

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Before Driving

Fuel and Emission



However, when the driver's door

is locked using the following

functions, the fuel lid is also

locked at the same time.

CAUTION

Always use only a genuine Mazda

fuel-ﬁller cap or an approved

equivalent, available at an

Authorized Mazda Dealer. The

wrong cap can result in a serious

malfunction of the fuel and emission

control systems.



Auto lock/unlock function

(page 3-17)

Auto re-lock function (page

3-5) and (page 3-13)



2. Press the location shown in the

illustration and open the fuel lid.

(U.S.A. and Canada)

It may also cause the check engine

light in the instrument cluster to

illuminate.

When using an automatic car wash

or a high water pressure car washer,

lock the vehicle. Otherwise, the

fuel-ﬁller lid may open unexpectedly

and could be damaged.

Refueling

▼

3. To remove the fuel-ﬁller cap, turn it

counterclockwise.

4. Attach the removed cap to the

inner side of the fuel-ﬁller lid.

Before refueling, close all the doors,

windows, and liftgate/trunk lid, and

switch the ignition OFF.

1. Using the following, unlock the

driver’s door.

4–door



Transmitter (page 3-16)

Touch sensor (page 3-13)

Door-lock switch (page 3-16)

Auto lock/unlock function (page



3-17)

NOTE



When unlocking the driver's

door, the fuel lid is also unlocked

at the same time.

When locking the driver's door,

the fuel lid is locked after 90

seconds.

The time until the fuel lid is

1. Fuel-ﬁller lid

2. Fuel-ﬁller cap



locked after locking the driver's

door can be changed.

Refer to the Settings section in

the Mazda Connect Owner's

Manual.

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Before Driving

Fuel and Emission

5–door

NOTE

Lock the doors after closing the

fuel-ﬁller lid.

If the fuel-ﬁller lid is closed after

locking the doors, the fuel-ﬁller lid

cannot be locked.

CAUTION

(U.S.A. and Canada)

If the check fuel cap warning light

illuminates, the fuel-ﬁller cap may not

be properly installed. If the warning

light illuminates, park your vehicle

safely oꢀ the right-of-way, remove the

fuel-ﬁller cap and reinstall it correctly.

After the cap has been correctly

installed, the fuel cap warning light

may continue to illuminate until a

number of driving cycles have been

completed. A drive cycle consists of

starting the engine (after four or more

hours with the engine oꢀ) and driving

the vehicle on city and highway roads.

Continuing to drive with the check fuel

cap warning light illuminated could

cause the check engine light to

1. Fuel-ﬁller lid

2. Fuel-ﬁller cap

5. Insert the refueling nozzle all the

way and begin refueling. Pull out

the refueling nozzle after the

refueling stops automatically.

6. To close the fuel-ﬁller cap, turn it

clockwise until a click is heard.

7. To close, press the fuel-ﬁller lid

until a click sound is heard.

4–door

illuminate as well.

5–door

8. Make sure to lock all the doors

when leaving the vehicle.

3-30

Before Driving -> Fuel and Emission for Your Mazda 3 4 Door Fourth Generation (2019-2026)

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