What Octane Gasoline Should a Focus Use?
2 Answers
Ford Focus's manufacturer officially recommends using 92 octane gasoline, with a multi-point electronic fuel injection system, fully compliant with the China VI emission standards. Additional details are as follows: 1. Usage requirements: Use unleaded gasoline that meets the GB17930-2013 standard for 92 octane gasoline (V) or higher. 2. Prohibited use: Fuels containing methanol. 3. Gasoline octane rating: The higher the vehicle's compression ratio, the higher the required gasoline octane rating. Generally, for a compression ratio of 7.5-8.0, use 90-93 octane gasoline; for 8.0-8.5, use 90-93 octane gasoline; for 8.5-9.0, use 93-95 octane gasoline; and for 9.5-10.0, use 95-97 octane gasoline.
I've been driving a Focus for several years, and the most reliable recommendation is to use 92-octane gasoline, as the Ford manual clearly states that it's suitable for 92-octane or higher unleaded gasoline. 95-octane can also be used, but there's really no need to spend extra money, as 92-octane fully meets the engine's performance requirements. Higher gasoline octane ratings indicate higher anti-knock properties, mainly to prevent engine knocking, but the Focus's engine design is inherently durable, and using 92-octane for long-distance driving poses no issues at all. I've tried using 95-octane and didn't notice much difference in fuel consumption; the acceleration was slightly smoother, but the difference was minimal. If you accidentally use a lower-octane gasoline, such as 90-octane, it might cause increased engine noise or reduced power, so it's best to switch to 92-octane promptly. Regularly checking the fuel system and choosing reputable gas stations for 92-octane gasoline can protect the engine's lifespan and save money.
