Oil pressure drops in long, fast right-hand turns on track
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What causes "Oil pressure drops in long, fast right-hand turns on track" on the Toyota GR86 / Subaru BRZ (ZN8/ZD8, 2022+), and how is it fixed?
Under sustained cornering load, oil pools in the cylinder heads instead of returning to the pickup. Fix: No factory fix.
Symptoms
On track, logged oil pressure falls from roughly 50-60 psi into the 20s in long, fast right-hand corners or over crests, mostly above 6,000 rpm.
Cause
Under sustained cornering load, oil pools in the cylinder heads instead of returning to the pickup. This is separate from the RTV problem. Subaru said it stands behind the FA24's design as a road car. Toyota later covered at least two failed engines under warranty, one with a confirmed spun bearing.
Fix (summary)
No factory fix. Owners and shops use a small oil overfill (up to about half to one quart), short-shifting below 6,000 rpm in fast right-handers, and an Accusump-style accumulator. Baffles have shown little or no measurable improvement in the data reported. An oil cooler may cost a few psi. Log oil pressure before trusting any fix.
Related build entries
Other ZN8/ZD8 problems
- Excess RTV sealant clogging the oil pickup (early FA24)
- Rear turn signals may not work (2022 BRZ and GR86 recall)
- Check engine light for cam timing, evap leak-check or ECM communication codes (ECM update)
- Automatic transmission code P0613 (2022 BRZ TCM update)
- Wrong load-capacity label on some dealer-accessorized GR86s
- BRZ aluminum front knuckles rule out most Gen1 brake kits
More for this car
- All Toyota GR86 / Subaru BRZ (ZN8/ZD8, 2022+) fitment answers · ZN8/ZD8 common problems
- Newsletter archive: past issues with every new and corrected entry
Sources
- New Data Suggests Subaru BRZ and Toyota GR86 Lose Oil Pressure In Right Turns on Track — Road & Track (Jun 2023) (editorial; read 2026-10-26; full page read)
- FA24 engine failures don't daunt the BRZ and GR86 faithful — Hagerty Media (Aug 2023) (editorial; read 2026-10-26; full page read)A baffle prototype made no meaningful difference.
- Understanding Oil Starvation in a BRZ/GR86: Solutions and Upgrades — FunctionTheory (performance shop blog, Feb 2025) (vendor article; read 2026-10-26; full page read)Overfill, rpm discipline, Accusump; Tomei baffle helped little.
Summaries are in our own words. Not repair instructions; consult the factory service manual.
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