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 Posted: Sat Apr 17th, 2010 04:27 pm
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Joined: Sun Oct 7th, 2007
Location: South Carolina USA
Posts: 6784
There is a difference as you say., the auto grade isn't as pure...I have seen both used in refrigeration applications with no problems. As long as your using a good auto grade brand (some of the small 1lb. Cans that are china made have extra oil to get the weight up to the 1lb. Mark.) I don't think you will ever have a problem using it in refridgerators....the sad truth is the sealed systems aren't designed to last long enough for the long term problems (if there are any) to become a factor.

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