I have asked this question in another forum and was directed here. I have asked a couple of Subaru dealers and a local garage (specializing in Subarus) about oil filters and they all have said the same thing that Subaru brand filters must be used on the Impreza RS (2.5) becuase the Subaru OEMs have a check value that after markets oil filters lack. Is this true? or are they trying to sell more oil filters. Also, dealer(s) say that the oil drain plug washer must be replced at every oil change. Is that true? I have never heard of such a thing from other car manufacturers.
Currently I use only Subaru brand oil filters and Castrol Syntec 5w30. Is this a good idea? I have heard that some synthetic oils may not be good becuase the PFTE particles may clog oil pumps and oil drain galleries in the engine block and cylinder heads. Is this true?
Can I use a Purolator oil filter instead? Should I keep using Castrol Syntech 5w30?
Currently I use only Subaru brand oil filters and Castrol Syntec 5w30. Is this a good idea? I have heard that some synthetic oils may not be good becuase the PFTE particles may clog oil pumps and oil drain galleries in the engine block and cylinder heads. Is this true?
Can I use a Purolator oil filter instead? Should I keep using Castrol Syntech 5w30?