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
Reviews of HKS engine oil
6 votes
2 reviews
I use HKS oil.
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What we know about HKS engine oil
The brand is registered in Japan.
In March 2026, PartReview does not yet have a formed opinion of HKS engine oil. This part is not in the ranking due to insufficient reviews. You can help by adding a review for HKS engine oil.
Currently there are 2 reviews and 6 votes. Average rating — 5 out of 5. Vote balance: 6 up, 0 down.
Users also evaluated the qualities of HKS engine oil:
- Warning light - oil pressure light flicker demands attention - no rating yet
- Engine noise - louder ticking or knocking can mean low or old oil - no rating yet
- Exhaust smoke - blue smoke indicates oil burning that needs checking - no rating yet
Engine oil HKS in car-specific ratings
See which car brands and models owners choose HKS engine oil for. Below are car-specific ratings where this part is in the Top-3:
- HKS ranked #3 for: Subaru Impreza WRX .