Coolant

for 1968 Buick Wildcat 430ci V8 · RWD

Fluid Type

Ethylene glycol green coolant 50/50

Spec: GM 1899-M or equivalent

Capacity

20qt

18.92 L

Drain & Refill

18 qt

17.03 L

Change Interval

24,000 mi

38,616 km

Data quality

Book-style estimate

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Notes

V8 430ci with heater. Largest nailhead displacement. Use conventional green coolant; avoid modern long-life coolants in original brass/copper radiators.

Other fluid systems on this vehicle

Automatic Transmission

11 qt

Washer Fluid

1.5 qt

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years. Spot an error? Use the Help link above — a human reads every report.

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