[Kajtek1]

UPDATE.
6V solenoid come with ground activation, so running it via ignition was not an option.
I bought nice , flat, start switch, but it turned to be electronic switch with some circuit board, so I found small limit switch in my garage junk, who I bolted under the dashboard for starter activation.
Works pretty well.
I changed the oil and put 10W50 for hot summer, while filling it only 1/2 of the sight glass. (3 quarts)
So far that seems to stop the drips on park car. Will do more driving in coming days, so I will see how it works on hot engine.