So I rang the support line written on the side of the container. (Went through to Mobil i think)
Their view was that the green coolant would have been OAT based anyway.
He reckoned all was good and the only problem with putting the wrong stuff in would be the rust inhibitors could be neutralised.
And that would take lots of miles too.
As I'd flushed the old coolant out anyway his view was that any risk was minimal.
Just to make sure I'll renew it next year to dilute it down further. Maybe.
Jeez when did i get so bloody needy!!!