oil viscosity question

[coldkeeper1]

I´m being offered both 150 SUS and 300 SUS for medium to low temperature R-22 racks manufactured by a new company. They both are OEM approved by Copeland. I used to believe that the 150 SUS oil was the best for these two applications, both according to the salesperson the 300 SUS oil is another good alternative. Is that correct?

[powell]

I´m being offered both 150 SUS and 300 SUS for medium to low temperature R-22 racks manufactured by a new company. They both are OEM approved by Copeland. I used to believe that the 150 SUS oil was the best for these two applications, both according to the salesperson the 300 SUS oil is another good alternative. Is that correct?
cold,

Here is a link to two Copeland AE bulletins. It's interesting that they no longer referece viscosity, just brand names and types. I do believe all of these are 150 viscosity but one would need to check them out individually.

Check out these two bulletins.

Section 17, bulletin 17-1248 and
Section 26, bulletin 93-11R16
http://www.hvacrinfo.com/ae_index.htm

Here's another link to a Copeland FAQ website that addresses this question.

Check out question 12.
http://www.emersonclimate.com/contractor/support/faq/faq_CopelandCompressor.shtm