On Thu, 6 Nov 2008 08:43:32 -0500, "jamesgangnc"
wrote:

Most any light to medium weight oil can be used in hydralic systems. The
non-detergent is because of the proximity to water, detergent oils attract
water. Foaming means air is still mixed in it. Let it settle overnight and
top it off. It might take a little while to get all the air out of the
system but once it is out the foaming will stop.

I'll be danged - I didn't know that.

Learn something new everyday.