PT 1982, you can't just cut the gear with 50/50 oil. Your BA/BB (if that's what he used) will be all screwed up for keeping the juice in solution. Test P typically recommends at least 20% BB and 2% BA to hold solution. I'm sure there are variants, but this is the most common. In your example, if you start with 2% BA and 20% BB, cut with 50/50 oil only, you'll be at 1% BA and 10% BB in the end and holding solution will be questionable. Whenever you cut, you need to add BA and BB to do it correctly to keep your ratios in line.