Sorry for posting two threads close to each other - I felt it was the right way to do it, since they contain quite different questions.
I've just got the wife a new Ford Ka 1.2 (the one that shares a lot with the Fiat 500). After driving less than a mile, the water temperature is already warm in it.
On the other hand my Ecoboost 1.0 Fiesta takes around 5 miles before the water is warm (4 bars)
I assume this is because the Ecoboost engine doesn't allow cooling water into the cylinder block until the engine is properly warmed up.
This leads me to the question: Has anyone tried fitting an OBD adapter and measuring the oil temperature to figure out when it's properly warm ?
I'm thinking about buying one, but this is the sole purpose I'd use it for, so it seems a bit expensive if someone else knows the answer.
Like I mentioned, my car takes around 5 miles to heat up the water, but I've no clue if the oil is warm as well by then.