Interesting US Dept of Energy look at friction in car engines etc
 

I found this on the US Dept of Energy's website.
NB the URL to the link: https://www.energy.gov

I have posted the 1st couple of pages below.

Here's the link to the complete presentation;
https://www.energy.gov/sites/prod/fi..._17_fenske.pdf

Parasitic Energy Losses
https://ecomodder.com/forum/attachme...1&d=1733619128

https://ecomodder.com/forum/attachme...1&d=1733619147

https://ecomodder.com/forum/attachme...1&d=1733619171

https://ecomodder.com/forum/attachme...1&d=1733619189

https://ecomodder.com/forum/attachme...1&d=1733619393

https://ecomodder.com/forum/attachme...1&d=1733619419

https://ecomodder.com/forum/attachme...1&d=1733619431

https://ecomodder.com/forum/attachme...1&d=1733619446

Here is another link showing a test engine used in these experiments etc;
https://www.energy.gov/sites/prod/fi...t08_fenske.pdf

Whew.