Evacuation removes most all of the oil. They discard the rusty old oil,
and insert a full (pint?) fresh charge of oil.

Developing business and guiding change since 1996,

G. Matthew Bulley
Bulley-Hewlett
Marketing & Communications
Business: www.bulley-hewlett.com
AIM = IExplain4u
Phone: +1.919.658.1278

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf
Of Larry Alofs
Sent: Monday, August 12, 2002 4:20 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: A/C Performance in '91 GL

"G. Matthew Bulley" wrote:
>
> I've heard from two AC techs that the key to keeping your LONG-TERM AC
> bill to a minimum, is do some SHORT TERM maintenance. That means
> bi-annual evacuation, and replacement of the receiver/filter/dryer,
and
> a topping-up of the oil. Evacuation boils off ALL moisture in the
> system, keeping the parts from rusting internally
>

I don't understand about "topping-up of the oil".  How can you tell how
much oil is in the system.  Seems to me you would have to drain the oil
from every component and start from scratch.

Larry A.
Chicago (Beautiful, walkable, Hyde Park)