My oil changing times is near and need to know what to go with. So need some reviews, advice and corrections on what im typing here.
So i heard some talks about some oils that come in barrels or so designed for certain countries and oils that are from american shops which were made for that climate. Then saw a oil test between Royal Purple, Amsoil and Schaeffer's on a load bearing test. From what was seen, Amsoil was the first to fail, while Royal Purple did not even fail for the entire testing. Another test was done some other time by the place but was not there.
So im thinking to go with Royal Purple engine oil and as for many years of the garage that highly recommends it, have not heard of any engine failures on STi's and WRX's. Currently the car has Schaeffer's and its quiet and works smooth but thinking to just go with Royal Purple and done.
Now the gearbox has Royal Purple as well, but i've been told to use the Subaru Extra-S oil.....i do have the 5th gear grind when going at high rpms but this does not happen all the time, especially when cruising and changing gears like a slowmo...
I've noticed my clutch cylinder fluid is black, so its possible the rubbers are going or could be the fluid is dirty and never was changed as the car used to be used on weekends mostly.
QUESTION - Do you think i should drain all the fluid and flush it out and try new fluid and see what happens? Or change clutch master & slave cylinders? The fluid change wont be costly, but time is what i don't got The diff oil, well im sure most of you guys with STi's can recommend the best to use as i wanna change that also so i know when i did a full oil change up.
Thanks in Advanced!