Thank you so much for the fast reply!Could you double-check your engine size, please? The 3.5L was offered in earlier years but may have still been available in 2010. It would be a pushrod engine. The 3.6L is a DOHC engine that is quite a bit different.
As for the engine size - it is for sure a 3.5L, says so everywhere including the engine cover, decals and registration. I know for sure my model is one of the last 3.5 of 2010's in my country (Israel).
It is also a 4-speed transmission (unfortunately, feels like a 6-speed would suit her much better. I wonder if anyone ever changed that?).
As for the temperature - I understand the gauge reading can be a bit off sometime so I never count on that. When the car feels like it needs air and it's overheating (again, not overheating too much for it to pop up an error on the dash or limp mode), I try on the A/C and then the fans go to the fast speed setting and TONS of hot air blows out of the engine - proving me that it needed that air boost.
I will try your approach and report with results as soon as I can and even upload the graph here.
Do you think it might have something to do with the thermostat, maybe? Or is there any direction I can look into? We're getting closer to summer days and I really don't want this heavy load on the engine in the hot days.