I THOUGHT everyone knows EVERY modern car will do 100'000 miles with no bother on the engine, in general.
Even a shit car you wouldn't worry whether it'd reach that mileage.

As said I'd have the 330d over petrol, remapped will give same bhp, and ridiculous amounts of torque, and still 50% more mpg on top of petrol.
The 3.0 bmw diesel needs to be tried before being dismissed as an old clanker.