What gas does a 2005 Acura TSX take?
The 2005 Acura TSX requires premium unleaded gasoline with a minimum octane rating of 91 AKI (Anti-Knock Index).
For context, the TSX’s 2.4-liter K-series engine is tuned for higher-octane fuel to maintain performance and prevent knocking. In North America, the owner’s manual specifies premium gasoline with an octane rating of 91 or higher. Using regular 87 octane is not recommended and can lead to reduced performance, efficiency, and potential engine management adjustments.
Fuel requirements and practical guidance
The following summarizes the key points you should know when fueling a 2005 TSX:
- Premium unleaded gasoline with an octane rating of 91 AKI (minimum) is recommended or required.
- Using regular 87 octane can degrade performance and may trigger knocking or other engine protection responses; stick with premium fuel for best results.
Following these guidelines helps maintain engine performance and longevity. Always refer to the owner’s manual for your specific region’s fuel recommendations.
Regional notes
In the United States and Canada, premium gasoline rated at 91 AKI or higher is the standard recommendation. If you drive a similar model outside North America, be aware that octane labeling and fuel formulations differ by region (for example, RON-based ratings in Europe). When traveling abroad, verify local fuel requirements before fueling.
Summary
The 2005 Acura TSX takes premium unleaded gasoline with a minimum octane of 91 AKI. Use premium fuel to preserve performance and prevent engine knock, and consult the owner's manual for region-specific guidance.
