Never tried Royal Purple, but I only ever use the Subaru Black oil filters, or the Blitz Racing oil filters. For oil tho, I’m gonna be putting in HKS Super Oil Premium 10W-40 due to the phenomenal HTHS capabilities compared to Motul and VR-1
been using Castrol edge 5w-30 for the past 5 years My WRX engine still feels responsive but i know 5-40w is good overhead for high temps
It's perfectly fine for the WRX, and it's what I use in mine, as well as its two previous owners. My car's maintenance records include two reports from Blackstone Labs detailing their examination of the Rotella T6 5W-40 oil and according to those the engine has worn very well on that oil
Just finally did my yearly oil change on my old faithful 04 wrx 177k miles last week. Put 14,370 miles on the signature series 0w40. Oil sample got in today. 31% oil life. Very little brass, relative clean oil. Waiting for my rod bearings to die but if this keeps up they might last a bit longer! Keep in mind I was using amsoils 25k mile oil filter aswell.
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This part for Subaru Impreza WRX is made around the world. We have reviews for engine oil manufacturers from countries such as: Netherlands, Germany, Japan, USA .
In March 2026, the ranking of engine oil for Subaru Impreza WRX on PartReview included 4 manufacturers. It is based on 4 reviews and 12 votes.
Last month, PartReview users preferred Shell. 25% of positive votes went to this manufacturer.
In second place: engine oil Castrol — 25%.
Third place: HKS with 25% of the votes.
In the overall ranking of engine oil, which aggregates opinions of owners of different car makes and models, these brands hold the following positions:
After seeing which engine oil owners of Subaru Impreza WRX prefer, check other popular parts for this car. In March 2026, leaders on PartReview were:
