Mobil Rarus 427/Equivalent?

[kartracer55]

I have a 5hp single stage Eaton Compressor putting out 20cfm@90psi with a slow turning pump sped of around 600rpm. They call for mobil Rarus 427 which I believe is a 30 weight oil, correct? Synthetic or Dino? Are there any better alternatives? My biggest thing is that this compressor gets weekend use in a wide temperature range with long drain intervals. Should I continue using this or is there a better synthetic alternative?

Thanks
Jim

 

[tom slick]

Mobil makes great industrial products. I wouldn't think twice about using it.
The first hit on google using "mobil Rarus 427" comes up with this:
http://www.mobil.com/Canada-English/Lubes/PDS/IOCAENINDMOMobil_Rarus_427.asp
which should answer your questions about it.

SAE 30 = ISO 100

 

[hi-miler]

I personally will STAY AWAY from Mobil Rarus because of too much wax in the oil! In the application I had, the wax migrated out and into the refrigerated dryer which subsequently clogged badly and had to be replaced. There were also some other compressors that had startup problems in winter temps using Rarus.
Full synthetic is the way to go as far as I'm concerned.
It provides good flow in the winter, (oil with wax in it does not), there are no wax migration issues, and you can run it for extended periods without having to worry about accellerated wear.
WW Grainger has a synthetic that I've been satisfied with in the past, nowadays I use the Amsoil line of products and am equally satisfied.
Hope this helps
Steve

 

[artificialist]

http://www.amsoil.com/products/compressor/compressor_xref.pdf
Amsoil's guide states to use Amsoil PCK.
http://www.amsoil.com/StoreFront/pck.aspx

Use it with confidence.

 

[kartracer55]

thanks guys

 

[cosynthetics]

My Amsoil industrial cross reference says to use PCK

Amsoil PCK

 

[HM12460]

have you looked into mobil shc 824? or shc 627?