Still trying to find a good solenoid valve to use on the oil feed in case of turbo failure.  I need a normally open valve.  Several companies have such a valve listed on their web sites but they do not seem interested in selling me only one valve.  Most other retailers only sell normally closed valves.

Dave, I posted details of my fuel solenoid to this list this morning. This would work for oil too. It's made by Vickers, and you could probably get one for your "off road vehicle" from the local hydraulics shop.

John