[R-390] Synthetic Oil

[rbethman]

This "may" be a mantra for HVAC, BUT, I would add a caveat.

All motor oils in the '60s sold and used in automotive shops for oil 
changes would be completely contrary to this philosophy.

The reason is simple, ALL main crankshaft and rod bearings that attach 
to the crankshaft ARE nothing but sleeve bearings.

The specific issue that is mentioned regarding HVAC "sleeve" bearings, 
is "most likely" a reference to "sintered bronze bearings".  These are 
porous, and causing a glaze on them *would* be significant.  They are 
"prelubricated" at time of manufacture, and oiling them during 
maintenance, the recommended oil IAW the manufacturer would be the best 
path.

Bob - N0DGN



On 7/25/2014 3:12 PM, Tom Nicholson wrote:
> Barry & All,
>
>     Having been raised in a family of HVAC workers, I was taught early 
> on that when lubing a "sleeve bearing" motor to always use 
> non-detergent, as the detergent additive would "glaze" the sleeve 
> bearing and cause premature wear. It did seem to work for heating 
> circulators and  aqua boosters. Would this not apply to Mobil 1 , etc. 
> ??? Just asking
>
> Tom
> W1ALZ