A very nice car indeed, congratulations on that ! kidding around well sort of
Your car with my cars motor = a Slow car, but it would have unbelievable economy.
My advice is keep track of your fuel used, I write my mileage down on the fresh fuel receipt then reset my trip meter, once at home I use a fuel mileage calculator online.
It can help to keep your driving style in the "economy" mode if you force yourself to keep track of your mileage and improve on it.
What a nice car though