2 core versus 3 core radiators

[AB]

As far as I can see any affect is going to come from the oil cooler, it is the only part where coolant and oil need each other.
If the oil cooler is gunked up, which many are it isnt going to work effectivly, so less oil cooling, more oil temp. Oil coolers inability to keep up so the coolant gets hotter and so on.

Are you in favour of the effectiveness of an oil cooler to cool down water temps?

I really just want Jonathan to buy it and put it in his td42 so I can see first hand results