2001 Ford Focus Owner Guide 4th Printing - Page 232

Maintenance and care 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 gasolinespecifications 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 approves the use of gasolines to improve air quality, including reformulated gasolines that contain oxygenates up to 10% ethanol or 15% MTBE. 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. 232