Volkswagen Golf GTI 2016, Owner'S Manual, Page: 1040 / 1341

Starting fluids can explode and cause a run-away vehicle
condition.
Never use starting assist fluids.
WARNING
Never use fuel with an octane rating lower than
87 AKI/91 RON. Using lower octane fuel may cause expensive
engine damage.
Never use leaded gasoline! Leaded gasoline will severely
damage your vehicle's catalytic converter.
Methanol-blended fuels that do not meet the criteria listed
above may cause corrosion and may damage plastic and
rubber parts in the fuel system.
Never use fuels that contain lead or other metals (check listing
on the fuel pump). Even lead replacement gasoline (LRP
fuels) contain metallic additives in high concentrations. They
can damage the engine.
Do not use fuels that fail to meet the criteria above, or with
contents that cannot be identified.
NOTICE