I use it in my 544. Of course, the pan was full of Mobil 1 when the rod bearing spun 2 summers ago too, but I doubt you could blame that on the oil. The oil pressure gauge shows it to retain viscosity better when old and hot (I change on 5K mile intervals), and the engine stays nice and shiny inside. Not that expensive really when you get the 5 qt. jugs from Wally mart and change it yourself, although the European car garage near my house had a sign up advertising $75 synthetic oil changes (!). My theory is that they really didn't like doing oil changes, and put that up to discourage people asking.

I use it in the '93 240 turbo too, I figure it is less likely to coke in the turbo if shut down hot.
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I'm JohnMc, and I approved this message.