SKU: EROXD15W-40C
MPN: XD15W-40
The 15W40 CK4 Heavy Duty 6 x 1 Gallon from EXTREME RACING OIL is designed for serious diesel and heavy-duty gasoline engine applications where robust film strength and extended drain intervals are essential. This six-gallon bulk package is ideal for fleet maintenance, commercial truck operations, and dedicated enthusiasts who require consistent protection across multiple service intervals.
Heavy-duty 15W40 formulations are the industry standard for vehicles operating under sustained load, high-temperature conditions, or extended service schedules. The CK4 classification ensures compliance with the American Petroleum Institute's latest diesel engine oil standards, providing enhanced oxidation stability, improved soot handling, and superior aeration control compared to older CI-4 formulations. The 15-weight cold-pour viscosity guarantees reliable cold-start flow in winter conditions, while the 40-weight hot viscosity maintains a protective film layer under sustained high-temperature operation.
EXTREME RACING OIL's proprietary additive package offers anti-wear protection, rust and corrosion inhibition, and detergent properties that keep combustion deposits in suspension, preventing sludge buildup and extending engine life. This six-pack format is perfect for commercial operators, maintenance shops, and private fleet owners who need reliable bulk supplies for their heavy-duty engine needs.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
