Originally Posted by skywaffles
Car engines of the past 20 years can easily make it to 150k. 150k is nothing nowadays.
Cars these days may actually do worse. New engines are running higher compression, leaner, and hotter than ever before in search of efficiency. Couple that with unproven (longterm) technology like DI, CVTs (which already have laughable reliability), and electronically controlled EVERYTHING.
I've often wondered about that myself. Pushing materials to extreme limits for greater efficiency and advances in engineering design accuracy mean there could be less margin of safety built into the design and inherently shorter life. Don't forget lighter oil running for longer duration and extended maintenance intervals on everything.
Trading a few percent more in fuel efficiency for less overall lifetime would be a poor trade in the total energy cost for a car.