Fluid · Engine Oil
Engine Oil
for 1978 Oldsmobile 98 350ci V8 Diesel · RWD
Fluid Type
15W-40 or 30W diesel oil
Spec: API CD or CD/SF
Capacity
7qt
6.62 L
Drain & Refill
7 qt
6.62 L
Change Interval
3,000 mi
4,827 km
Data quality
Book-style estimate
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Notes
Capacity with filter. GM 5.7L diesel engine requires diesel-rated oil. Use 15W-40 in most conditions
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