Fluid · Engine Oil
Engine Oil
for 1956 GMC 250 Series 4.4L (270 cu in) inline-6 · RWD
Fluid Type
SAE 30 or 10W-30 conventional
Spec: API SB or higher
Capacity
6qt
5.68 L
Drain & Refill
6 qt
5.68 L
Change Interval
2,000 mi
3,218 km
Notes
With filter. GMC's 302 V6 (60-degree design). Slightly higher capacity than I6.
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