I let my parents borrow our cars. I have a friend that has a nicely setup CJ that I took Em jeeping in. He has taken the Cobra up the mountain switchbacks. We always return them with full tanks. He is a fabricator so I had no worries. If he did anything to it the item would get replaced with something better.
My sister and her husband can drive any of ours as well.
Most people I know I don't have to worry about asking since they can't drive a manual.
Oh Jim, thanks for your concern!