In the mid 80’s I visited a LR showroom and the new and unregistered Range-Rover in their showroom had a pool of Hypoy-90 underneath it. We all know what the salesman said when I mentioned it: “They all do that sir”.
Power steering fluid?
They also had ‘porous’ water pump housings.

And northernmorgan, as for Stanley’s torque; I’m glad that the legend has spread!
Anyway, back to the original topic.
Nice one Mr S. You’ll have fun with that.
ps Glad it’s not an Amilcar, or I would have been very envious.
(My Dad had a Gordon England Austin 7 in the 1930s.)