I am asking myself this question right now…. All engines have become very complex nowadays. In the engine development one buys one advantage again with several other disadvantages. In addition, there are so rarely stupid misconstructions (e.g. TFSI) and quality problems (if we stay at the VW Group: control chain). Today’s motors: Direct injections have problems with the coking and the increased fine dust load. As a result, particle filters and other filter systems must be installed we In general, the engines have become more complex…. Turbo, the AGR also needs its cooling, with diesels the glow plugs like to bake. With the increased complexity of course also the susceptibility to errors increases and repairs can become very complex and expensive. At all I have the impression that not infrequently engines already after 50000km cause problems and many do not even 150000km. So if I buy a semi-current car nowadays, there are d a still engines that are recommended?