I have a 2019 Mazda 3 GT Sedan. When it gets to -15C and below the engine can't get the needle out of the blue. Tried to use sport mode to increase the RPM's, but it flashes on the dash and won't come on when this happens, so I have to put the car into manual mode and keep it a gear or two below the norm and it's a marginal affect. Idle and revving the engine is more effective. The highway seems to made it colder. This the the second year to have this issue. Last year they discovered not enough anti freeze was put in at factory. Lots of issues with this new build. Are there different rated thermostats in the radiator depending on your Lattitude? Not good to have it on the highway when the temp is so low.