Steve or Larry
I would love to find a 30 lb cyl of GOOD r12 in our area. The cheapest I could find today was $550. I can't justify that much to gain a few deg if my system works fine now. Remember, I said logistics plays into the equation. I totally agree that you need all the cooling you can get. In NC I have not been disappointed with my system even on the hottest days in traffic. I realize I can't win this argument so I will shut up.
Have a great day.

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84 500 SEL (307,xxx miles)