Mazda 2013 Mazda3 Owner's Manual page 150

Vehicle damage and drivability problems resulting from the use of the following may not
be covered by the Mazda warranty.
Gasohol containing more than 10 % ethanol.
l
Gasoline or gasohol containing methanol.
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Leaded fuel or leaded gasohol.
l
Fuel and Engine Exhaust Precautions
Before Driving Your Mazda
4-3