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    Different oils in old and new AC compressors

    Hi, I am replacing the AC compressor on a 2004 model vehicle that came with a Sanden SD7H15, and I am using the same Sanden SD7H15. Both old and new compressors are model number 7850, but there's 15 years in age difference between manufacturing dates. The old unit says it takes SP-20 oil, and...
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