Fluid · Manual Transmission
Manual Transmission
for 1966 Oldsmobile Cutlass 225ci V6 · RWD
Fluid Type
80W-90 GL-4
Spec: API GL-4
Capacity
3.5qt
3.31 L
Drain & Refill
3.5 qt
3.31 L
Change Interval
36,000 mi
57,924 km
Data quality
Book-style estimate
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Notes
3-speed manual transmission. Later GL-5 oils may cause synchronizer issues; prefer GL-4.