I’ve had my 2019 ford fusion (1.5L ecoboost engine) for not even 2 months now and I unfortunately was not aware of the dreaded coolant intrusion that these engines are known for getting. Symptoms: coolant smell out of exhaust, shaking, rough on cold start, misfiring in the same cylinder no matter what, slow coolant loss (no visible leaks), check engine light on and sometimes blinking, and eventually it started to over heat constantly. No white smoke, no milky oil, and would run pretty good after it got warmed up. I will never go near another Ford. That’s a personal preference not saying every single ford is bad but do not dare purchase one with an ecoboost engine specifically years 2014-2019 1.5, 1.6, and 2.0. If you have one of these trade it in, now! Save yourself. It’s a design flaw and you’ll have to rebuild the engine by changing over to the new block design and it costs a shit ton of money. Oh and the worst part is, ford won’t help. No recalls. I have no warranty and cannot afford the engine to be rebuilt. I threw some k seal in there and gonna pray it gives me more time! Thanks for reading! Stay vigilant :) if you experienced this before and tried sealant like I did, did it work for you?

A bit of a cautionary tale for fusions and 1.5L engines! Please read if you have one or thinking of buying one.