For that 250hp version of the 3.0L H6, Subaru said premium unleaded fuel was recommended . After some years had passed, our dealership saw a few of those engines coming into our shop with cracked pistons. When pressed, the owners said they ran a steady diet of regular unleaded fuel.
Reviews of OEM Subaru pistons
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3 votes
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1 review
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OEM Subaru
Japan
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What we know about OEM Subaru pistons
The brand is registered in Japan.
In March 2026, PartReview does not yet have a formed opinion of OEM Subaru pistons. You can help by adding a review for OEM Subaru pistons.
Currently there are 1 review and 3 votes. Average rating — 4 out of 5. Vote balance: 3 up, 0 down.
Users also evaluated the qualities of OEM Subaru pistons:
- Power - engine feels weak, especially under load - rated negatively. 1 point out of 5.
- Smoke - blue smoke indicates oil getting past pistons - no rating yet
- Noise - deep knocking under heavy throttle is a danger sign - no rating yet
Pistons OEM Subaru in car-specific ratings
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