Not an expert but I used some spare 600w on my spring covers. Ensure you blot off excess. The day after I installed my spring covers I thought I had developed an axle leak. Turned out to be excess oil dripping out of the spring cover.
Light grease may be a better option...
I also sprayed my spring leaves with graphite dry lube before installation of the spring covers B'laster Graphite
On the spring covers I've installed I soak the felt lightly with 600W as Y-Blockhead does, then smear on a layer of Mystik JT-6 High Temp grease. Between this and smearing grease and graphite between the leaves, the Model A has a very nice ride and the springs will be lubed for many years.
I used 600W on my roadster and both axle covers leaked as it ran down the felts.
I just today used Lucas hub oil on the wife'sTudor and it did not leak out. But I did not measure the amounts and may have used less on the second car.
But the hub oil looks much like STP in consistency - sticky enough to stay put better than 600W, perhaps.
SAJ in NZ
I just perched a set of spring covers .Do the clips go on the bottom? The directions are not very clear. Or can someone send me a picture. That will be a big help. Thanks
Yes, the clips go on the bottom. I might have a picture on my main computer, but I can't get it to open, so I've been using my backup computer for several weeks now.
I use 250 weight gear oil. If it drips out from excess, it will stop after a while, then just clean the axel housing and the floor.
I cut off the excess tabs after installation with a tin sheer.