Originally Posted By: artbuc
Originally Posted By: JTK
Originally Posted By: artbuc
I have a 25 year old Sears oil lubricated air compressor with a 2HP electric motor. The Owners Manual says to use 20-20W SF oil in summer and 10W oil in winter...
Are you sure it's not older? That is a really odd spec for something that's only 25yrs old. I've seen the 20w20 spec on various equipment, but it was well over 30yrs old. I'd throw a 5w20 motor oil in there, especially if you need to start it cold.
Joel
Joel, I can't remember exactly when I bought this unit but I am pretty sure it is in the 20-25 year range. For kicks & giggles, I will confirm the manufacturing date.
I did look at the oil over the W/E. It looks great. Can't remember when I changed it last but it has been years. I don't use it very much so I may still be well under the 100 hour OCI.
My Craftsman is 22 years old (1988) and has the same oil spec as yours. I bought it about 2 years ago from a guy who had bought it used but had never ran it since he didn't have 220v hookup.
So I don't know what oil had been used in it all those years. But it was dirty and needed changed, so I called a Devilbiss (manufacturer) tech and he said it was spec'd to use the 20-20w SF, but that I could use a good syn motor oil in it. I had some 10w30 PP on hand and used that, and it's been doing fine ever since.