It's great stuff.
My steam turbines at work have 30 tonnes of load on 18-20"diameter (and length) bearings.
Normally, the bearings have a jacking port on the underside, that provides 3000 psi oil to "jack" (lift) the shaft to allow it to turn at low speeds up to around 800RPM.
During maintenance, often the jacking oil system is unavailable.
A drizzle (literally) of lucas over the journals, leaving it sit, then providing a bit of torque by wrapping a soft sling around the coupling and lifting with a crane makes the shaft very easy (comparitively) to turn for doing run-outs and alignments...one squeeze lasts for days.
And being not much at all additive wise, doesn't eat the bearings, or contaminate the oil system.