Eli5: Why are petrol engines not built like diesel engines in terms of reliability?

Question

Diesel engines easily run 400.000km especially Mercedes cars but petrol will give up way sooner

In: Engineering

Answer 1

Not all diesel engines are robust. I had a 1995 GMC 3500 work truck with a diesel engine. In 4 years and less than 75K miles, it blew a head gasket and the engine was trash.