[67Twistytee]

Anyone here use a Quincy air compressor? I just picked up a near new Qt54 on Craigslist for a good price. I drained the oil prior to transport and need to refill for start-up. I know for warranty purposes Quincy insists you use their own private label synthetic which is sold in ISO ranges based on ambient air operating temps. Any other options I should consider? I used simple ND 30 weight in my CH cast iron series but maybe it's best to stick with synthetic for the Quincy.

[61-63]

Like you I use nd30 weight - in an 80gal 7hp compressor with a cast iron 2 stage pump which now has thirteen years on it with no problems.

IMO Quincy is just trying to sell oil to you but during the warranty period I would use what they tell you to use.

[Mr Twister]

Quincy compressors are very good. I have 3 at work, 2 of them run almost constantly. I use Mobil synthetic compressor oil on them.

[67Twistytee]

Since I bought the compressor used, Quincy won't transfer the warranty. So I can use whatever I want. This will sit in an unheated garage and I read the synthetics withstand winter/summer temp swings better. Not sure how true this is.

Originally Posted by Mr Twister

I use Mobil synthetic compressor oil on them.

The Mobil Rarus stuff? 30 weight? Unfortunately the only place I know around here that carries it is Grainger and it's more $$ than the Quincy Quincy Cip oil.

[67drake]

Originally Posted by 67Twistytee

Since I bought the compressor used, Quincy won't transfer the warranty. So I can use whatever I want. This will sit in an unheated garage and I read the synthetics withstand winter/summer temp swings better. Not sure how true this is.

No warranty,run what you want then. Compressors in unheated garages have been running Non detergent 30 weight for years. JMO

[Mr Twister]

Yes, It is the Mobil from Grainger, and it's expensive. I just took rod bearings out of one of the compressors and they looked great, after AT least being in service for over ten years cycling on and off a lot 24/7. It sounded like a rod knock in the compressor but was a loose flywheel.

[incommunicado]

I have been in the compressor business for 37 years. Simple 30W ND works great in a recip, change it once a year for home use and 2 X for extreme duty like a full time body shop.

There is no big advantage to synthetic in a recip, but for a screw compressor, that is a totally different animal and you want to use a good polyglycol synthetic.

I tell my friends and customers, buy a good slow speed (900 rpm or less) recip over a screw unless you plan on running the wheel off it. T
he exception to that is when you get above 10-15HP in a single unit.