PPPP 10W-30. This was the first oil change on the car after running the FF for ~ 2200 miles. I put 5564 miles on this oil from April to October, including a few trips to Memphis (400 miles round trip), many drives to work (38 miles round trip), and a trip to Gulf Shores (1000 mile round trip). It also saw many short trips. I don't idle the engine extensively. I always start the engine and go, but avoid full throttle and limit RPM to 3000 or so until the oil reaches at least 160 or so. The car also sat at the dealership for close to 3 months, from late June to late September, while they attempted to diagnose a noise that was eventually traced to a missing exhaust header stud nut, which resulted in exhaust gas eroding a hole in the exhaust header gasket, causing an exhaust leak and noise. A few on here made me aware that PPPP 10W-30 has a very good NOACK score (4.7%), and were of the opinion that it might hold up better in the WRX than other API-SN/RC 30wt. oils, while also being more stable and hopefully being a decent choice to hold down intake tract deposits. I think that hunch was correct, given the challenging environment of this engine (high-output, turbocharged boxer @ 134 HP/liter, direct fuel injection with known propensity to dilute crankcase oil with fuel). I think this 9.2 viscosity is still within spec for a 30wt, no? Not bad for a Walmart oil that's 22 bucks a jug. As far as I know, I'm the first to try this oil in this engine. The only thing I know they botched in the report is the sump capacity. The 2016 WRX sump capacity is 5.5 qts.