Toyota Matrix 2009 Owner's Manual page 35

Closing the fuel tank cap
Fuel type
n
Unleaded gasoline (87 Octane rating [Research Octane Number 91] or
higher)
Fuel tank capacity
n
13.2 gal. (50 L, 10.9 Imp. gal.)
When replacing the fuel tank
cap, turn it until a clicking sound
is heard.
After releasing your hand, the cap
will turn slightly to the opposite
direction.
1-5. Refueling
1
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