Ive always used Castrol Edge 5w30 Fully Synthetic in my Legacy. First oil change was done by MMS when I had a 100K service and thats what they put in. I was pretty happy with the result after they put that in so Ive just kept using it since.
Ive done two oil changes since that 100K service with the last one occurring three weeks ago. Still happy with the Castrol Edge.
Always use the genuine Subaru Oil filter though. Its not expensive and it apparently performs the best.
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RS Liberty - Because WRX's are only good for parts...
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