fuel additives MAZDA MODEL MAZDASPEED 3 2009 Owners Manual (in English)

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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.
2.3-liter turbocharger engine
Your Mazda will perform best with fuel listed in the table.
FuelOctane Rating*(Anti-knock index)
Premium unleaded fuel 91 [ (R+M)/2 method] or above (96 RON or above)
* U.S. federal law requires that octane ratings be posted on gasoline station pumps.
This vehicle is designed for and requires use of premium unleaded fuel. If 91 octane fuel [
(R+M)/2 method] (96RON) is not available, gasoline as low as 87 octane [ (R+M)/2
method] (91RON) can be used temporarily for emergency purposes. Use of gasoline lower
than 91 octane [ (R+M)/2 method] (96RON) can decrease performance during its use.
Refueling the vehicle with the correct octane fuel a couple of times will restore vehicle
performance.
Except 2.3-liter turbocharger engine
Your Mazda will perform best with fuel listed in the table.
Fuel Octane Rating*(Anti-knock index)
Regular unleaded fuel 87 [ (R+M)/2 method] or above (91 RON or above)
* U.S. federal law requires that octane ratings be posted on gasoline station pumps.
Fuel with a rating lower than 87 octane (91 RON) could cause the emission control system
to lose effectiveness. It could also cause engine knocking and serious engine damage.
CAUTION
Ø 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.
Ø Your vehicle can only use oxygenated fuels containing no more than 10% ethanol
by volume. Damage to your 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.
Ø Never add fuel system additives. Never add cleaning agents other than those
specified by Mazda. Other cleaning agents and additives may damage the system.
Consult an Authorized Mazda Dealer.
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 ”.
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Before Driving Your Mazda
Fuel and Engine Exhaust Precautions
Mazda3_8Z87-EA-08F_Edition1 Page108
Monday, May 19 2008 9:56 AM
Form No.8Z87-EA-08F

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Turbocharger Informationí
The turbocharger greatly enhances engine power. Its advanced design provides improved
operation and requires minimum additional maintenance. To get maximum performance
from your turbocharged engine, take note of the following tips:
lThe turbocharged engine is designed for optimal operation with premium unleaded
gasoline (page 4-2). Do not use fuel with a lower octane rating. Extra fuel additives are
NOT recommended.
lChange the engine oil and filter using the turbo engine interval outlined in the
maintenance schedule (for your driving condition).
lUse only the recommended engine oil (page 8-18). Extra oil additives are NOT
recommended.
lAfter driving at freeway speeds or up a long hill, idle the engine at least 30 seconds to
cool the turbo before turning off the engine. Avoid simply shutting the engine off
abruptly after a hard or long drive. Damage to the turbocharger may result.
lDo not race or over-rev the engine when starting. This should not be done with ANY
engine, especially not with one that's turbocharged.
lDo not add any aftermarket devices to alter the engine's ignition timing, fuel delivery, or
turbo boost pressure. This may lead to serious engine damage and may void your
warranty.
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Before Driving Your Mazda
íSome models.
Driving Tips
Mazda3_8Z87-EA-08F_Edition1 Page120
Monday, May 19 2008 9:56 AM
Form No.8Z87-EA-08F