I get exactly the same with my oil cap and i mainly do short journeys (work is only 3-4 miles away), 5 times a week.
One thing i have noticed, not sure if anybody else has but my GTI used to use quite a bit of oil, in its first year of running just over 8000 miles i used about 2 1/2 litres of oil.
Since it's first service i've covered 1500 miles and hasnt used a drop.
This engine just gets better & better!!
