Guys, picking up on the turbo failures on GP's and wondering about the suspected "batch" issue or is it something else?

To those of you who have re-mapped.

Do you change your oil at shorter intervals than the original Fiat recomendation or stick to that schedule?

If you change the oil more often (say half the interval) did you have a turbo failure?

If you stuck to the recomended schedule did you have a turbo failure?

I am assuming Selenia or equivalent grade / quality oil and filter were used.

Is your driving style "normal", "enthusiastic" or "manic"