Best Ford Focus for low costs: 1.0 EcoBoost 100 5dr Best Ford Focus for fuel economy: 1.5 EcoBlue 120 Active Edition 5dr Best Ford Focus for performance: 2.3 EcoBoost ST 5dr 2016-2018 Ford Focus; The Ford 1-liter EcoBoost is a 3-cylinder engine installed in popular subcompact, compact and economy vehicles. But the class action lawsuit alleges the EcoBoost engine is The service schedule advised by Ford for the Fiesta 1.0 EcoBoost is as follows: Castrol Magnatec 5w20 Oil and Oil Filter - Every Year or 12,500mi/20,000km. Cabin Filter - Every Year or 12,500mi/20,000km. Air Filter - Every 3 Years or 37,500mi/60,000km. Spark Plugs - Every 3 Years or 37,500mi/60,000km. The service schedule above is recommended If you book a manufacturer service, we'll carry out the checks specified in the Ford service schedule, according to the age, model and mileage of your vehicle Posted January 22, 2021. Wanted to double check this as I'm sure when I bought the car I looked it up and the service interval was 2 years or 18,000 miles, but I seem to be getting conflicting information, with some places saying 12 months / 12,500 miles. This is for a 1.0 Ecoboost also. Quote. d82r3.