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Out of the MANY different types of air conditioning and freon, I can safely say many of them use oils that are brightly colored. Green, fluorescent green to be clear. And I do mean a green that will startle you in any quantity. The oil usually has a near mineral oil smell. It is very thin as oils go, and will spread out over a large area typically becoming so thin that color is hard to determine if an oily spot is found. These oily spots indicate a leak.

Note: some appear yellowish but all that I have seen are very very noticeable.

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13y ago

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