hello guys need a advice , yesterday i found pool of  black oil or diesel which i don't know what is this because it  not smell either of them around two of my injectors , do i have bad injector? , but i don't have any issue with car for now ,everything works good as it should , just found them so it brothering me . do i need new seals , please advice me . thank you 

Unless it's a major leak or affects engine running I would just clean and monitor it, you could end up spending money to fix something trivial.

Thank you MicMac I will do that then and see.