The Peugeot oil specification for our engines is a C2 oil, which is mid SAPS and 2.9 - 3.5 HTHS. It isn't clear why Ford don't specify a C2 oil also, but if the engine manufacturer requires mid SAPS, then that's what I'm going to use.
Lubrizol some good info on the ACEA standards. This is fun to play with.
https://online.lubrizol.com/relperftool/pc.html
Yes, M2C913 oils should be backwards compatible.
Ford Europe state a 20,000 km / 1 year oil change interval, so Ford AU are already being conservative.
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