Toyota PRIUS 2014 Manual page 617

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Octane Rating

Fuel tank capacity

Notice about fuel

For plug-in hybrid vehicles, fuel may remain in the tank for a long time and

undergo changes in quality depending on the how the vehicle is used.

Refuel at least 5.3 gal.(20 L, 4.4 Imp.gal.) of fuel every 6 months (refuel a

total of at least 5.3 gal. [20 L, 4.4 Imp.gal.] over a 6-month period), as this

may affect components of the fuel system or the gasoline engine.

PRIUS PHV_OM_OM47856U_(U)

Unleaded gasoline only

87 (Research Octane Number 91) or higher

10.6 gal. (40 L, 8.8 Imp.gal.)

6-1. Specifications