R1234yf is not miscible in any refrigerant oils.

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Multiple Choice

R1234yf is not miscible in any refrigerant oils.

Explanation:
R1234yf is designed to be used with certain lubricants, specifically polyol ester (POE) oils, and it does mix with those oils to help lubricate the compressor. The idea that it is “not miscible in any refrigerant oils” isn’t correct because POE oils are compatible with R1234yf and form a single phase under typical operating conditions. However, it is not compatible with mineral oils, so those won't mix with R1234yf. In practice, systems that use R1234yf rely on POE oil for lubrication, not mineral oil.

R1234yf is designed to be used with certain lubricants, specifically polyol ester (POE) oils, and it does mix with those oils to help lubricate the compressor. The idea that it is “not miscible in any refrigerant oils” isn’t correct because POE oils are compatible with R1234yf and form a single phase under typical operating conditions. However, it is not compatible with mineral oils, so those won't mix with R1234yf. In practice, systems that use R1234yf rely on POE oil for lubrication, not mineral oil.

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