cbaker732

The owners manual says that high octane fuel is recommended but not required. I also remember seeing high octane recommendations when shopping for the car back in 2017. The computer system of the car should adjust timing so there is no knock when using regular (no pre-ignition from regular gas). But high octane fuel should also give a more forceful ignition. Is that contributing to the coolant leak? My ford dealer has changed several of the engines and does not find anything visibly wrong with any part. Others have mentioned that the design of the engine itself is faulty but does high octane fuel contribute to its failure?

What type of gas do you use if you have had a coolant leak in the 2.0 L ecoboost engine, 2nd generation? A class action lawsuit filed claims the seals and engine were not designed correctly, causing a coolant leak that requires a total engine replacement to fix. Ford specifies high octane fuel for the engine. If you had a coolant leak, did you use only high octane fuel or did you use regular routinely?