Since you don't know how old the oil is, I'd suggest an oil change. Buy a
quart of ND-30 from Napa or equivilant. Run the compressor for a couple
minutes, and then shut down the power. Drain the oil (square head plug, at
the bottom). Drain into a pan, or tin can or whatever. Mix the old oil in
with the engine oil you take to the auto parts. Fill with new ND-30 and
you're good to go for a couple years.

If your compressor looks a lot like a small engine, it's cause it is a lot
like a small engine.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"Jimi" wrote in message
el...
Hello,
I have an old (1950's I beleive) Wayne air compressor with a 20-25 gal
tank. I don't have a manual for it as it came in the garage when we bought
the house. It has a single cylinder and runs off 220 volt power. I see that
the oil level is down slightly so would like to top it up. Can anyone
recommend the weight of compressor oil?... While I'm at it, can anyone
recommend a website where I can get a pdf manual for such a compressor? I
have googled Wayne Compressors and have lots of sites, but no manuals...have
learnt that they were the compressor of choice for gas station owners in the
1920's though 1950's.............Thanks... Jim