Originally Posted By: Clevy
Originally Posted By: Hollow
Oil - Quality synthetic in a 0/5W30/40
Filter - OEM or Wix 57712 to meet Subaru's unusually high bypass spec
I wouldn't run convention more than 3000-4000 in this engine, the turbo gets hot. Synthetic should be good for 5000-7000. 5000 if you don't want to do any analysis and want a safe number.
My personal oils would be QSUD 5w30, Rotella T6 5w40, or Mobil1 0w40.
So all those big rigs with their diesels and huge turbos using conventional should worry about their turbo getting hot then,since your using that as some sort of reason not to use a conventional.
Turbos get hot everywhere they are fitted. Using hot exhaust gasses to spin an impeller will do that pretty effectively,yet even those big rigs,and diesel trucks out there who run mileages sky high,on conventional oil,and their turbos last just fine.
See where I'm going here.......
OP.
Try a Subaru forum and read what they've got to say and pick some guys brains here.
Use the used oil analysis section as a tool as well. See how long the oil lasts by reading the tbn,which is basically what necessitates an oil change.
Don't just follow an interval by cause some guy on the internet thinks it's a good idea because he's "never had any problems"
Acquire data. Use that data to make an informed choice.
I'm on the subaru forums. Small sump on a crammed in turbo engine for longer intervals on conventional will get you a new turbo at best and a new engine at worse. If you actually researched anything I said, on any Subaru forum, you would find I speak the consensus. Thanks for dismissing me out of hand though.