Well been driving Ford trucks for years.I just bought a 2018 3.5 V6 XLT 4x4 4000km now i am at 10,000km and regretting it.-30 not much heat take to the dealer and they say the heater core has to be replaced cant be done till next week.Also have rear Diff pinion seal leak.Get the truck back so driving it with not much heat go to leave work engine light is on Pull the code P0300 engine misfire.Truck seems to be running ok.You think they would give me a vehicle to drive till this is fixed.Think next vehicle will not be a Ford

 

I think there is another thread here where a member had the P0300 code. My thought is that it shows up after a cold start. The motor will have some random misfiring because the gasoline doesn't atomize very well at that temperature. Once a bit of heat is generated, then the issue goes away.