how much oil in intercoolers

[jpliddy]

hi all
just talking to a friend today i said i get a bit of oil lying in the intercooler pipe on the top of my engine at the joint between the rubber pipe and aluminium intercooler . as the intercooler pipes in and out of the intercooler are in the middle of the intercooler Rad does it mean theres a lot of oil in there below the pipes . my 940 d24 TDI 1995 uses no more than half a 3/4 of a litre oil between services about every 5000 miles for the last 20 years
is that a job i should be looking at after the winter here remove the intercooler
rad and check it .i have never touched this yet .
a diesel engineer once said to me these are good engines but dirty/oily due to there design !