Sparex source: https://us.sparex.com/10w-30-heavy-duty-diesel-engine-oil-2-5-gallons-143526.html Product: 10w-30 Heavy Duty Diesel Engine Oil - 2.5 Gallons - Sparex S.143526 SKU: S.143526 Listing note: Order in multiples of 2 (priced each) API CK-4, CJ-4, CI-4 PLUS, CI-4, and CH Detail enrichment pending: OEM cross references, fitment, catalog pages, and full specifications.