What is high mileage for a petrol + diesel when buying a car

[sixty]

I've had many people tell me not touch Petrol engines over 100k.

Where as diesels can have an urban myth like industrial solidness "oh it will easily get to 300k if serviced well" LOL

In your experience what is high mileage for a petrol and a diesel car when buying second hand? - Particularly from a risk/increased change of problems point of view.

[sixty]

My first passat sport 1.9 PD 130 failed at 175k miles, conrod through the block apparently






second passat highline 1.9 PD 130 only got to 100k before I sold it.