The engine control unit will detect the lower quality fuel and automatically adjust the timing to protect the engine. This higher octane rating helps to prevent premature ignition, known as knocking, which can occur under high compression.
VW Atlas Refueling Made Easy: Understanding Gas Types and Octane Ratings
Fuel Type Octane Rating Suitability for VW Atlas Premium Unleaded 91 Recommended Regular Unleaded 87 Acceptable (not ideal) E85 or High Ethanol Blend Variable Not Supported. Using the recommended fuel grade allows the engine control unit to advance ignition timing, delivering the power and efficiency the engineering team designed.
Standard Unleaded is Acceptable in Emergencies Although premium fuel is ideal, the VW Atlas can operate on standard unleaded gasoline (87 octane) in situations where premium is unavailable. Consequences of Using Lower Octane Fuel While the VW Atlas can run on regular unleaded gasoline with an octane rating of 87, doing so is not advisable for long-term use.
Effortless VW Atlas Refueling: Understanding Gas Types and Octane Ratings
This buildup can degrade performance over time and may eventually trigger the check engine light. Recommended Fuel Grade for Optimal Performance For the majority of VW Atlas trims equipped with the standard turbocharged four-cylinder engine, the manufacturer recommends premium unleaded gasoline with an octane rating of 91.
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