Fuel efficiency vs Engine life

I was wondering according your experience do you think fuel efficiency and engine life go together or recently producers make more short-term machinery . Here in Bulgaria many people complain about the DPF and AdBlue when the engine goes on emergency mode. Overall, I have noticed in machines in general like cars that are produced for the leasing/warranty period therefore machines like the old CATs , Liebherr etc. wont be produced again as contemporary machines will have much shorter life....

Fuel efficiency vs Engine life

Fuel efficiency vs Engine life