The fuel recommendation for the Infiniti Q50 varies depending on the specific engine configuration. Some models, particularly those equipped with the 3.0-liter twin-turbo V6 engine, benefit from using higher octane fuel, often marketed as premium gasoline. Other engine options may function adequately with regular grade fuel. Examining the owner’s manual or the fuel filler door provides definitive guidance on the manufacturer’s suggested fuel type.
Utilizing the recommended fuel grade can optimize engine performance and efficiency. While some vehicles are designed to operate on regular gasoline without compromising engine longevity, others are calibrated to take advantage of the higher octane rating found in premium fuel. Employing the correct fuel ensures the engine management system functions as intended, delivering the advertised horsepower and fuel economy. Historically, premium fuel was often associated with high-performance vehicles, but modern engine designs sometimes require it for optimal operation.