Hi, recently, I went to this car well, in a dodgy car park kind of place, where this guy has 5 golfs for sale, all around 1998-1999 .. varied mileage ranging from 80k to 160k!... one diesel, the rest, 1.6 and 1.4 ones, now the thing is, EVERY SINGLE ONE OF THEM, i take the oil filler cap off and...