Volkswagen Golf GTI 2016, Owner'S Manual

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Even a single tank full of leaded fuel can do major damage to the catalytic converter
and degrade its effectiveness in reducing polluting emissions.
If you notice a loss of fuel economy or drivability and performance problems using
one of these fuel blends, we recommend that you switch to unblended fuel. Never use fuel
line antifreeze offered for gasoline engines.
Gasoline additives
Please first read and note the introductory information and
contents that cannot be identified.
If you cannot tell whether a particular fuel blend meets the
criteria above, ask your service station or its fuel supplier. If
you notice a loss of fuel economy or drivability and
performance problems using one of these fuel blends, we
recommend that you switch to unblended fuel.
Using fuels that are different from those specified above can
damage your vehicle's engine and fuel system and cause
performance problems.
Damage to the engine and fuel system and performance
problems caused by using fuels that are different from those
specified above or by using starting assist fluids are not the
responsibility of Volkswagen and are not covered under the
Emission warranties or any other Volkswagen Limited
Warranty.