If I were to go to ,back to, R12, what all will I have to do? Flush,syn oil,what psi of vacume, and how many cans of R12 will it take to fill the system back?

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1985 300D burning WVO using 26 FPHE, half gallon heated fuel filter,glow plug heater,home made injection line heaters. Home made cold air induction. ALDA full out.
2003 F350 7.3(the last of the great motors)
1987 Paint Horse-non running too, just walks!

Flush, mineral oil (or compatible), should install new receiver/dryer, pull 29+ inches
of vacuum and make sure it holds, might want to pressure test with nitrogen in
addition to just the vacuum, 2.6 lbs of R-12.

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Bob
'82 300D Petrol B-G Metallic

Johnsens freeze 12 would be easier! It's available at Napa and is a direct replacement for R12 that you don't need a handling permit for. Just flush your system well. There is no need to add lubricant because it is a refrigerant oil!

There are NO direct replacements for R-12.

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