* Your Owner's Manual is the Authority: The best source of information about the correct fuel for your car is your owner's manual. It will specify the required octane rating and any other fuel requirements (e.g., whether premium unleaded is required or recommended).
* Engine Variations: The 1.8T engine came in several configurations. The exact specifications for your specific year and model will determine the appropriate fuel.
* Fuel Quality Varies: The quality of gasoline can vary significantly depending on your location. A fuel with a higher octane rating than specified may not provide any benefit and could potentially harm your engine.
To find the correct fuel information, please consult your Audi A4 1.8T owner's manual.
