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G05 is a bi-oat at the minimum, containing benzoate and at least one type of azole. it has molybdate which protects iron aluminum copper brass and solder. CG II relies on nitrate to make up for the loss of the nitrite/moly dynamic duo.I’ve run G-05 in older vehicles, mixed metal designs, but not brass/copper radiators. I’d run JohnDeere Cool Gard II in there which is cost effective.
John Deere Cool-Gard II uses sodium nitrate, but no longer uses sodium nitrite. Sodium nitrite has been banned in coolant in certain countries. It also uses the same OAT that Cool-Gard uses but also uses 2 additional OATs.