Hello,

I have a furnace in my house with 2 engines. Sometimes, when they
"squeak", I had a bit of oil though the oil input hole on the engine to
make it stop and prevent seizing.

The little can of oil I have used is very very oil, and only says
"engine oil" on it. I have run out and at sears I saw a smiliar looking
can. However it said "lubricating 3 in 1 oil t prevent rust... etc.."

I have been told there is a difference to this lubricating oil and my
old engine oil. Is there? Should I be using some different engline oil
on my furance engines?