Oil near injectors

[Seboni121]

I have a vw golf mk6 1.6tdi 61 plate 105 bhp and I'm getting oil pooling around the injectors worst ones are the first 2 from the right , I've mapped it up with tissues and left it and it returns again .. . , I've not topped up so its not over spill it was serviced at main dealers in oct last year and I notice oil on the top about 2 months after when removing plastic cover , so I thought overspill its not a lot but its shouldn't be there so thought what could it be ?

[Flash2]

The rocker covers on some 1.6 diesel engines leak in the area of the oil filler opening. The fix was to replace the rocker cover, which means replacing the injector securing bolts, seals, etc as well.

Jim.