Hello everybody!

I have a 1993 Legacy and a Peugeot 205 with a very rare engine

I use the same oil for both cars (Repsol elite injection 10w40), both cars were great with that oil. But I was advice that I needed a different oil for the Peugeot since the engine sends the oil to the transmission and the oils that works great for the engine it self is not protecting the transmission, the one that give me that protection is a certified API CI-4 PLUS oil, thatís the oil I had to find for the Peugeot, since i used the same oil for both cars i decided to try to use this new (new for me) oil in the Subaru too, since the oil is also certified SL for gasoline engines, i thought there wouldnít be any problem using it.

The oil is a Chevron Delo 400 15w40, the Peugeot is ok, but the subi now has a strange sound when idle or when idle alter revving.

i have a video on youtube but since i am new i am unable to post the link