| Zen-D Oil in intake
Hi friends, recently I noticed strains of oil in intake and I am confused wether to allow the service centre guys to check the issue as they seemed inexperinced about TUD5 diesel engines.
I have post some pictures of the issue and my doubts are :
1) Has this anything to do with valve oil seal ?
2) Gasket issue.
3) will it damage the air filter.
Though there is oil strains, I don't notice any difference in performance or increase in smoke. | 
