Fluid · Engine Oil
Engine Oil
for 1955 GMC 250 Series 248ci I6 · RWD
Fluid Type
SAE 30 or 10W-30 conventional
Spec: API SG or newer
Capacity
5qt
4.73 L
Drain & Refill
5 qt
4.73 L
Change Interval
2,000 mi
3,218 km
Notes
Single-grade SAE 30 typical for 1950s era; 10W-30 acceptable for multi-season use. Add 1 qt if replacing filter (canister-type).
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.