leaking tandem pump

[bigal23]

heard that the 140 tdi bkd engine has an issue with leaking oil into the fuel. does anyone know what colour the fuel from the fuel filter should be if its ok and not getting oil mixed in I took a pic of mine and could do with knowing if it looks ok

 

[SL11CKK]

That seems ok. If there was oil, there would be black like veins. It wouldnt be mixed completely

 

[bigal23]

thank you.
I thought because diesel and oil mixed that it would not settle and didn't know if the yellow ish colour of it was from oil