The EX35 requires premium gasoline (91 octane or higher) for optimal performance; regular gasoline is not recommended.
Fuel requirements for the EX35
The EX35, powered by a 3.5-liter V6, is designed to run best on premium unleaded gasoline. Infiniti’s official guidance for most markets is to use premium fuel to preserve engine performance, efficiency, and emissions control.
Below are the key points to know about fueling your EX35:
- Premium unleaded gasoline with an octane rating of 91 or higher is recommended.
- Regular unleaded gasoline (87 octane) is not recommended and may lead to reduced performance and engine knock.
- Gasoline containing up to 10% ethanol (E10) is generally compatible; avoid higher ethanol blends such as E15 or E85 unless specifically approved for your model year and market.
- In markets where octane labeling differs, follow the local equivalent (for example, 95 RON in some regions) to meet the premium standard.
In short, to maintain peak performance and protect the engine, use the premium fuel as specified. If premium is unavailable, consult the owner's manual or a Infiniti dealer for guidance on acceptable substitutes and any warranty implications.
Model-year and regional notes
The EX35 was produced from 2008 to 2012 and maintains a consistent premium-fuel recommendation across those years in major markets. However, regional labeling and fuel standards can vary, so always verify the exact requirement in your vehicle’s manual or on the fuel-filler door for your market.
Why it matters for performance and warranty
Using the correct octane helps prevent knocking, maintains smooth power delivery, and supports emissions systems. Infiniti’s guidance for the EX35 emphasizes premium fuel to sustain warranty coverage and engine longevity. Relying on lower-octane fuel can degrade performance and potentially affect warranty coverage if it leads to engine damage from improper fuel use.
Summary
The INFINITI EX35 is best fueled with premium unleaded gasoline, 91 octane or higher, across its typical production years. Regular gasoline is not recommended, as it can reduce performance and raise the risk of engine knock. Always check your specific model year and region in the owner's manual or with a dealer to confirm exact requirements.