wrote in message
...
On Thu, 10 Jun 2010 13:35:55 -0400, "Existential Angst"
wrote:

wrote in message
. ..
On Thu, 10 Jun 2010 13:25:03 -0400, "Existential Angst"
wrote:

wrote in message
m...
On Wed, 9 Jun 2010 20:50:40 -0400, "Existential Angst"
wrote:

"J Burns" wrote in message
...
jamesgangnc wrote:
On Jun 9, 3:24 pm, J Burns wrote:
A decal on my furnace blower seemed to say the motor was
permanently
lubricated. The other day I got my head a little lower and saw a
second
decal saying it should be lubricated every couple of years with
20W
nondetergent oil.

I think 3-in-1 is like that, but I can't find my can. I did find
a
4-ounce container of Marvel Lubricating Oil. Among the uses
listed
on
the label is "small electric motors."

Small is relative. Would Marvel Lubricating Oil be good for a
furnace
blower?

I'd say it's a bit thin. My walmart has 30wt nondetergent. I'd
probably lean that way if I couldn't find 20wt. Nondetergent also
gets used in things like pressure washers.

Thanks, it looks as if you and Salty Dog are right.

One way to measure viscosity of motor oil is cSt at 40C. CSt is a
measure
of the number of seconds it takes a certain amount to drain through
a
certain tube.

At 40C, the cSt of 10W should be 25-35
20W 40-80
30 80-120

I have a fresh can of 10W-30, a remnant of 30W nondetergent in a can
I
bought last year, and a little 20W-50 in a can several years old. I
started with the 10W-30 because it's the freshest.


seconds at 25C
10W30 22
20W50 40
30W 47



If the 10W30 has a cSt about 30, the 20W-50 has a cSt of 55. So
far,
so
good. The 30W ND seems to have a cSt of 64, like 20W oil. So maybe
that
brand of 30W could pass for 20W.

The Marvel Lubricating Oil? Three seconds!

Good show, very inneresting.

But simply shaking MMoil, or feeling it, tells you its too thin.
My jugs of it tout it as an additive. So you may be able to "cut"
some
of
the oil you have, and use it in your motor, if the oil you have feels
too
thick. Or perform you cSt test on various mixtures..

REALLY bad advice.

Why?

You mean other than the fact that ANY advice from you is usually
REALLY bad advice?

Yup.

Marvel Mystery Oil is about SAE 3W, which is quite a bit thinner than
the SAE 20w called for in this application.

Still don't understand "mix", eh?


It is also quite flammable at relatively low temps.

See my other post. You are dead wrong.

Probably not too
smart to use on a heavy duty motor, especially one attached to a
furnace. Of course, "not too smart" is a specialty of yours, so maybe
you should try it.

It's about 20% solvents. I'll bet that really leads to long bearing
life!

Heh, the mix thing again...


Once again, for anybody reading this... Existential Angst is either a
complete moron, or he deliberately posts incorrect and sometime
dangerous advice. Either way, you really don't want to do anything he
suggests without first asking someone with a little knowledge and a
lot less hostility.

Well, I have enough knowledge to put some MM oil in a blue flame and observe
that it does not burn.
And I know the diff between flash point and ignition point.

Funny how you speak with so much authority, and are wrong in almost all of
your assertions.
Once in a while you luck out, but clearly it is luck.
--
EA