Intercooler oil leak
Following a relatively long journey ~100 miles a couple of months ago, I noticed a little patch of oil on my driveway. I took my car to the local garage and they said that the oil came from the intercooler. They cleaned the residue off and said that it's such a small amount of oil that it's not worth replacing the intercooler until it gets much worse. There were no more oil leaks until today, when I went on another 100 mile trip (50-60 mph). I usually use my car for local driving to town etc without any problems.
What do you think is causing oil to leak only after long journeys?
Some forums have mentioned the crank case ventilation (CCV) system, and others have mentioned turbo seals and much scarier sounding stuff. The leak is coming from the bottom near side corner of the intercooler. What do you think?
BTW, 75s look great on sunny days.