hi everyone
first of all im in the market for a Vr6 after a very nice talk with my insurance company

I went to look at a very tidy non modified VR over the weekend with 109k on clock and full VW service history! it was serviced 2k ago by vw and looks very good nick!!
Now the reason for selling is because he only uses it on sundays and can justify keeping the car and only does about 30 miles a week in it!
but when i took the oil cap off there was a mayo liquid on the cap!!! but it was very very runny and pretty much ran dripped off the cap and it was gone!!! i imediately thought oooopps head gasket!! but he said it was because it sits and condinsation builds up in the oil filling chamber in VR's!!! i looked in to the engine from the oil cap hole and couldnt see any more mayo! or evven get anything on my fingers when i put them right down in there!!! it was only on the cap and like i said just ran off when i held the cap on its side!!!! i checked the dipstick and this was clean as the oil was fine!!! but it worries me greatly! as im not clued up on VR's at all!
is this a car i should walk away from or is it common with vr's that dont get driven much and sit out in the damp air we have the moment all help appreciated guys
thanks
Scott