Seems to be a question that continually pops up for owners, so I figured I would start a thread where owners can discuss preferences and observations for the multitude of options out there.

I'll go ahead and start this one off with my own personal experience. Since taking ownership of my 02 WRX with 06 EJ257 swap, I have run Castrol Syntec or now called Castrol Edge full synthetic 5w30. I like to keep my oil change interval or OCI right around 3000-3500 miles, and use at most a 1/2qt over the course of the that interval. I have yet to preform a used oil analysis, but have plans to this summer to check up on the health of my engine and how it likes the Edge. T6 seems to be all the rage these days but need to preform more research before I consider making a switch.

Now keep it going with any thoughts, question, experiences and general banter focused around the oil for your WRX.