See also:

Readiness for inspection/maintenance (I/M) test
Due to legal requirements in some states and Canadian Provinces, your vehicle may be required to be in what is called the ready condition for an Inspection/Maintenance (I/M) test of the emissi ...

Gasoline specifications
NISSAN recommends using gasoline that meets the World-Wide Fuel Charter (WWFC) specifications where it is available. Many of the automobile manufacturers developed this specification to improve em ...

NISSAN dealer.
However, now and then you may notice light spark knock for a short time while accelerating or driving up hills. This is not a cause for concern, because you get the greatest fuel benefit when ther ...