Octane rating tips

Octane rating tips  - Fuel recommendation - Capacities and recommended fuel/lubricants - Technical and consumer information - Infiniti G Owners Manual - Infiniti G

Using unleaded gasoline with an octane rating lower than recommended above can cause persistent, heavy spark knock.

(Spark knock is a metallic rapping noise.) If severe, this can lead to engine damage.

If you detect a persistent heavy spark knock even when using gasoline of the stated octane rating, or if you hear steady spark knock while holding a steady speed on level roads, have an INFINITI retailer correct the condition. Failure to correct the condition is misuse of the vehicle, for which INFINITI is not responsible.

Incorrect ignition timing will result in knocking, after-run or overheating. This in turn may cause excessive fuel consumption or damage to the engine. If any of the above symptoms are encountered, have your vehicle checked at an INFINITI retailer or other competent service facility.

However, now and then you may notice light spark knock for a short time while accelerating or driving up hills. This is no cause for concern, because you get the greatest fuel benefit when there is light spark knock for a short time under heavy engine load.

CAUTION
Х Your vehicle is not designed to run on E- 85 fuel. Using E-85 fuel in a vehicle not specifically designed for E-85 fuel can damage fuel system components and is not covered by the INFINITI new vehicle limited warranty.
Х E-85 is a mixture of approximately 85% fuel ethanol and 15% unleaded gasoline.
Х U.S. government regulations require ethanol dispensing pumps to be identified by a small, square, orange and black label with the common abbreviation or the appropriate percentage for that region.

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