This is typical of what happens to a standard K Series head gasket which has been run with OAT antifreeze.............
My own 214 has run blue antifreeze since 2006 when I changed the gasket at 26,000 miles.
Annual coolant changes and 370000 miles later that same gasket is still in service.
Anecdotal certainly, however in every case of coolant/oil crossover HGF the car has had OAT antifreeze, something that was relatively rare on pre 1997 cars prior to OAT becoming standard.
It should be noted that the only reason that OAT was used in the first instance was to extend the coolant service intervals from two to five years to be competitive for fleet markets.
The choice is yours at the end of the day, however I run Unipart SuperCool Blue in all of my own cars
Brian
