fuel additives MAZDA MODEL SPEED MX-5 MIATA 2005 Owners Manual

Black plate (80,1)
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.
MX-5/Miata
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.
You may use a regular unleaded fuel with an Octane Rating from 87 to 90 (91 to 95 RON)
but this will slightly reduce performance.
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.
MAZDASPEED MX-5
Fuel Octane 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.
CAUTION
lUSE ONLY UNLEADED FUEL.
Leaded fuel is harmful to the catalytic converter or the oxygen sensor. The lead will
accumulate on the oxygen sensor and the catalyst inside the converter. This will result
in a malfunction of the emission control system, causing poor performance.
lYour 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.
lNever 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.
l(MAZDASPEED MX-5)
Never use fuel other than premium unleaded fuel for your vehicle. Use of other fuel
could cause poor engine performance and serious engine knocking.
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
MX-5 Miata_8T72-EA-04G_Edition2 Page80
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Form No.8T72-EA-04G

Black plate (91,1)
Turbocharger Information (MAZDASPEED MX-5)
The turbocharger greatly enhances engine power. Its advanced design provides better
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 8-15). 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. Avoid simply shutting the engine off abruptly after a hard or long drive.
Damage to the turbocharger may result.
lDon't 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.
Before Driving Your Mazda
Driving Tips
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MX-5 Miata_8T72-EA-04G_Edition2 Page91
Tuesday, August 31 2004 11:24 AM
Form No.8T72-EA-04G