What's the consensus on using OATs antifreeze in a 300 tdi?

Thread on LRO suggests there's the potential for seal / hose/ gasket damage.

Anyone experienced any issues? - the searches I've done don't turn up any concrete evidence for or against.

I've just flushed & filled my 300tdi with Halford's OAT's; starting to wonder if I need to drain, flush & refill with a standard coolant.