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      02-18-2013, 03:43 AM   #34
mryakanisachoad's Avatar

Drives: '13 550xi + '09 M5 + '10 135i
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Originally Posted by loesch View Post
Good point. We'll see how it all plays out.

Start up and shut down are the areas where turbochargers are most at risk. Most engine wear occurs at start up.

Basically, it's is okay to shut down a hot naturally aspirated engine, but its really bad for a turbocharged motor. To avoid coking of oil on the bearings, it's always been a good idea to let the engine idle for a minute or so. That's always been the best way to shut down a turbocharged engine.

Perhaps bearing technology has improved to the point where it doesn't matter anymore? I doubt it but like you wrote, we'll see.