Hyundai Elantra 2024 Owner's Manual page 500

Maintenance
NOTICE
Damage to the fuel system or
performance issues caused by the use of
these fuels may not be covered by your
New Vehicle Limited Warranty.
Using fuel additives (except
detergent fuel additives)
Using fuel additives such as:
• Silicone fuel additive
• Ferrocene (iron-based) fuel additive
• Other metallic-based fuel additives
May result in cylinder misfire, poor
acceleration, engine stalling, damage to
the catalyst, or abnormal corrosion, and
may cause damage to the engine
resulting in a reduction in the overall life
of the powertrain.
• The Malfunction Indicator Lamp (MIL)
may illuminate.
NOTICE
Damage to the fuel system or
performance issues caused by the use of
these fuel additives may not be covered
by your New Vehicle Limited Warranty.
Gasoline containing MMT
Some gasoline contains harmful
manganese-based fuel additives such as
MMT (Methylcyclopentadienyl
Manganese Tricarbonyl).
HYUNDAI does not recommend the use
of gasoline containing MMT.
This type of fuel can reduce vehicle
performance and affect your emission
control system.
The malfunction indicator lamp on the
cluster may come on.
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Detergent fuel additives
HYUNDAI recommends that you use
good quality gasolines treated with
detergent additives such as TOP TIER
Detergent Gasoline, which help prevent
deposit formation in the engine. These
gasolines will help the engine run cleaner
and enhance performance of the
Emission Control System. For more
information on TOP TIER Detergent
Gasoline, go to the website (www.
toptiergas.com).
For customers who do not use TOP Tier
Detergent Gasoline regularly, and have
problems starting or the engine does not
run smoothly, detergent-based fuel
additives that you can purchase
separately may be added to the gasoline.
If TOP TIER Detergent Gasoline is not
available, one bottle of additive added to
the fuel tank according to the
maintenance schedule is recommended
(refer to the Owner maintenance
schedule in this chapter).
Additives are available from your
authorized HYUNDAI dealer along with
information on how to use them.
NOTICE
Never add any fuel system cleaning
agents or other additives to the fuel tank
other than HYUNDAI fuel additives to
prevent damage to the engine and engine
components.
Contact an authorized HYUNDAI dealer
for additional information.