FORD 2002 Focus v.1 - Manual (Page 286)

Maintenance and Specifications
286
It should not be necessary to add
any aftermarket products to your
fuel tank if you continue to use high
quality fuel of the recommended
octane rating. Aftermarket products
could cause damage to the fuel
system. Repairs to correct the
effects of using an aftermarket
product in your fuel may not be
covered by your warranty.
Many of the world's automakers
issued the WorldĆwide Fuel Charter
that recommends gasoline
specifications to provide improved
performance and emission control
system protection for your vehicle.
Gasolines that meet the WorldĆwide
Fuel Charter should be used when
available. Ask your fuel supplier
about gasolines that meet the
WorldĆwide Fuel Charter. In
Canada, look for fuels that display
the Auto Makers' ChoiceT logo.
Cleaner air
Ford endorses the use of
reformulated cleanerĆburning"
gasolines to improve air quality.
Do not use gasolines containing
methanol, which can damage
critical fuel system components.
Damage resulting from the use of
methanol may not be covered by
your warranty.