Originally Posted by jabarr
Yeah, he’s kind of full of himself but there is some useful info.
Yes, but limited to the wear materials that is in his field of experience. On the remainder, DanH nailed it for me.
Regarding wear materials - - SwRI did some very interesting real time wear studies with radioactive materials 40 years ago showing wear during start ups and load changes were the worst, orders of magnitude worse. I 'm pretty sure some of this was published in SAE papers back in late 70's and 80's. These tests were some of the reasons that truckers were recommended not to shut off their engines very often.
Also, gives me pause for the modern auto engines (mine!) that want to stop-and-restart and every stop light.