First of all my friends 2007 model 307 1.6 hdi 90 now the oil is at the bottom of the malfunction injectors so it is not always but there is always a place that should be dry. now the injector seal gaskets wedges bolts have been replaced to correct the malfunction. I did not go, then I changed the engine top cover, we put the oil on the top, I changed it and got the original (270tl)
a little decreased but it has not disappeared. Now they say the intake manifold gaskets in the injectors did everything we did not have gone.