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r-12 or freeze-12 (already added mineral oil)

lowriderdog37 on Sun June 22, 2008 10:21 AM User is offlineView users profile

Year: 1985
Make: Mercedes
Model: 300CD
Engine Size: 3.0
Refrigerant Type: None (yet)
Ambient Temp: Country of Origin: United States

I did a rebuild of my system yesterday, I replaced expansion valve and dryer. I flushed the lines and replaced all the seals I came across. I am going this morning to get my system vacuumed and filled. I was going to fill with r-12, but am getting cold feet about using $100 of r-12. What I was thinking about doing is to fill with freeze-12, then if I am not satisfied, I can evac the system and fill with r-12.

I already have the mineral oil in the system, can I just put the freeze-12 in? The freeze-12 website says yes and no...so I am torn.

I'll take care of fittings and stickers as required by law, I just don't want to screw up the system, and want to get good air.

TRB on Sun June 22, 2008 3:15 PM User is offlineView users profile

You don't what you use R134a and mineral oil!

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bearing01 on Sun June 22, 2008 10:29 PM User is offline

Freeze-12 is 80% R134a

aliaZ on Mon June 23, 2008 8:50 AM User is offline

You should have used a quality POE lubricant, which would allow you to use either R-12 or R134a.

Using mineral oil really limits your options

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