Volkswagen Golf GTI 2016, Owner'S Manual

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and fuel consumption is stabilized.
To reduce fuel consumption and the emission of pollutants
effectively, the engine and catalytic converter must reach their
optimal operating temperature. Critical in this context is also the
outside air temperature.
→ Fig. 147 and → Fig. 148 display the varying fuel consumption
rates for the same distance driven, once at +68 °F (+20 °C) and
once at +14 °F (-10 °C).
Therefore, avoid driving short distances unnecessarily and
consolidate routes.
Under the same conditions, the vehicle consumes more fuel in
winter than in summer.
Letting the engine run to warm up is not only illegal in some places,
but also technically not necessary and wastes fuel.
Adjust the tire pressure
The proper tire pressure helps reduce rolling resistance as well as
fuel consumption.