Diagnostic procedure
Mazda 6 Service Manual: Fuel Requirements
Vehicles with catalytic converters or oxygen sensors must use ONLY UNLEADED FUEL,
which will reduce exhaust emissions and keep spark plug fouling to a minimum.
This vehicle will perform best with fuel listed in the table.
* U.S. federal law requires that octane ratings be posted on gasoline st ...
Mazda 6 Service Manual: Road test
Warning
When performing a road test, be aware of other vehicles, people,
impediments, etc. to avoid an accident.
Note
When the legal speed limit must be exceeded, use a chassis
dynamomenter instead of performing a road test.
Road Test Preparation
1. Inspect the engine coolant le ...