Does an Acura Ilx require premium gas?
Answer depends on the ILX model and engine. In most cases, the 2.0-liter ILX can run on regular gasoline (87 octane), while the 2.4-liter variants perform best with premium (91 octane or higher). Always confirm with your owner's manual or the fuel door label for your exact vehicle.
Engine options and octane guidelines
The ILX has been offered with multiple powertrains over its production run. Here is a concise guide to octane recommendations by engine type.
- 2.0L i-VTEC (2013–2015 ILX): Regular unleaded gasoline (87 octane) is acceptable. Premium gasoline is not required, though some drivers may choose to use premium for perceived throttle response or under demanding conditions.
- 2.4L i-VTEC (2016–2018 ILX): Premium gasoline is commonly recommended for best performance and efficiency. Regular 87 octane can be used, but you may notice reduced power and response under heavy load or hot conditions.
- ILX Hybrid (2014–2015): Regular unleaded gasoline (87 octane) is suitable. Premium is not required for the hybrid version.
These guidelines reflect what Acura typically communicates through owner literature and fuel labels. Using the octane level recommended by the manufacturer helps ensure optimum performance and avoids knocking under load. If you’re unsure about your exact model/year, consult the owner’s manual or the fuel door decal for the definitive specification.
What the owner can do to confirm the requirement
To be absolutely sure you’re using the correct fuel for your ILX, you can take a few quick steps. Checking the fuel door label and the dealership-supplied manual ensures you’re following the manufacturer’s guidance for your exact vehicle configuration.
Check the fuel door label
Many Acura models, including the ILX, place octane information on a label near the fuel filler. This label shows whether regular or premium is required or recommended for your specific trim and year.
Consult the owner's manual
The manual’s Fuel and Emissions section or the Engine Specifications page will specify the required vs. recommended octane. If premium is listed as required, using regular can reduce performance or risk knocking; if only recommended, regular is acceptable but premium may improve performance in certain conditions.
In practice, most daily driving in an ILX with the 2.0L engine will be fine on regular fuel, while the 2.4L variants are more likely to benefit from premium for peak performance and throttle response. Always default to the manufacturer’s instruction for your exact model year.
Summary
For the Acura ILX, octane requirements depend on the engine. The 2.0L models typically run on regular (87 octane); the 2.4L models generally benefit from or require premium. The hybrid version uses regular gas. When in doubt, check the fuel door label and the owner’s manual for your specific car to avoid misfueling and to maintain optimal performance.
