The Febi stuff was designed for engines with serpentine belts..ie..M103/M104.
I'd bet a buck you could use it in the 380/420-500/560 V8 cars.
I wonder if plain-jane PS would likewise work in the M103/M104.
This fluid stuff gets confusing.
I think I'll go outside and replace my R-12 with Freeze-12 and my MB coolant with Prestone.
It was hot outside today.