Is it neccessary to change the oil after a new set of injectors?
Thanks:ro)

I would. Most people have diesel in the oil. It gets anything out that may have gotten in it as well.

They changed my oil, oil filter and fuel filter at the dealership after replacing the injectors - didn't cost me a dime!:D

they changed ours as well, but we got a new engine. :D Didn't cost anything but 2 weeks at my mother-in-laws, and 2 nights in a hotel in the town it was being fixed at.

Changed injectors due to a high rate of fuel in the return line, mechanic claims it wasn't leaking from the sleeves. I just changed my oil with Delvac 5W-40, dealer didn’t change it and wouldn’t put back 5W-40 in it anyway. I already drove it for 1 hr. maybe I will just do a filter change.