600W was just the kind of oil. It is not actually 600 weight. Its thicker than hypoid oil but thinner than Lucas or STP. My buddy put actual 1200 weight into his brass era car and had to use a spoon to feed it in.
Those cheap hand pump deals suck. I highly suggest investing in one of the many vintage professional grade pumps available on your local craigslist. Posted using the Full Custom H.A.M.B. App!
Scored this for 2 bucks at the swap meet today. I'm thinkin' fill it with 90w, replace the nozzle with a hose, compressed air on the shraeder valve and go.