Hi Paul - strikes me as being a bit paranoid.
Oil pressure warning light and a pair of eyes would do for most people.
Also there may be occasions where you would need to risk driving on to a place of safety. I wouldn't fancy an instantaneous fuel cut-off while tanking it up the outside lane of a motorway(way to scary for me thanks !!)
regards - Chris

Hi Chris, An interesting and seat gripping scenarion you have painted there. Hadn't thought of it in those terms so definately food for thought. Would be a scary situation while travelling at the maximum legal limit in the outside lane and the oil light comes on. A risk either way and definately buttock clenching. Thanks to all for their thoughts. This system was fitted to Range Rovers and SD1's I believe. Regards Paul

Hi everyone who has posted on this subject.

After reading all the previous posts I think the route I favour is to see if it is possible to have the oil pressure light come on at slightly higher (10/15) psi and fit a separate manual OFF Switch to the fuel pump (perhaps with a "Doomsday Cover") so it cannot be accidently operated.

Cheers Rob