Quest Minivan SE V6-3.3L (VG33E) (1999)
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The graph on the following page shows that PAG oil left open to air (e.g. in an unsealed container) will absorb 2% moisture (by weight) in 120 hours
(5 days).
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PAG containers, and any A/C component which contains PAG oil (such as the compressor) should remain tightly capped and sealed until ready for
use.
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If you believe that a container of PAG oil may not have been adequately re-sealed after opening, dispose of the oil properly and use oil from a new
sealed container.
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When installing or servicing an A/C system, the refrigerant tube and hose connections should be sealed (all connections made and tightened to
specification) without delay.
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The above precautions will keep the absorption of moisture into the system to a minimum. Using moisture saturated PAG oil in R-134a systems may
lead to the formation of acids and related system damage or failure.
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Do not allow refrigerant oil (Nissan A/C System Oil Type S) to contact styrofoam, as the lubricant will damage this material.