Cermax Ceramic 10w-30W Synthetic Diesel Motor Oil

Yes — Cermax 15W-40 is formulated to meet API CK-4 requirements, which means it's fully compatible with all modern diesel emissions hardware: DPF (diesel particulate filter), DEF/SCR (diesel exhaust fluid with selective catalytic reduction), DOC (diesel oxidation catalyst), and EGR (exhaust gas recirculation). The oil's low-SAPS additive chemistry (sulfated ash, phosphorus, sulfur) is designed to protect aftertreatment systems from ash loading and catalyst poisoning — required for 2007+ on-highway diesels and 2011+ off-highway Tier 4 engines.

Yes — Cermax 15W-40 works in all modern pickup diesel engines. Ford Power Stroke (6.7L, 7.3L, 6.4L, 6.0L, 7.3L IDI). Ram Cummins (6.7L, 5.9L, 4BT, 6BT). GM Duramax (L5P, LML, LMM, LBZ, LLY, LB7). Use the 12-Quart Case for a single oil change on most pickup diesels (typical capacity is 12–15 quarts). Always consult your owner's manual for specific viscosity recommendations — some manufacturers specify 5W-40 or 10W-30 for certain operating conditions, but 15W-40 is the industry standard for 2007-and-newer heavy-duty pickup diesels with DPF systems.

Yes — Cermax 15W-40 is formulated for Class 8 over-the-road applications. Works with Cummins (X15, ISX, ISM, L9, N14), Detroit (DD15, DD13, DD16, Series 60, Series 50), PACCAR (MX-13, MX-11), Volvo (D13, D16, VED12), Mack (MP8, MP7, E7, AC, AI), and Mercedes-Benz (OM460, OM471, OM473). Formulated to meet OEM fluid specifications including Cummins CES 20086, Detroit DFS 93K222, Mack EO-S 4.5, and Volvo VDS-4.5. The 55-gallon drum is the most economical option for fleet operators. For custom fleet pricing, contact 239-344-9861.

Up to 30,000 miles is possible with Cermax 15W-40* — but extended drain intervals require three conditions: (1) Quality filtration — use premium-grade full-flow and bypass filters; (2) Oil analysis monitoring — send samples at 10K, 20K, and 25K intervals to confirm wear metals, TBN, soot, and fuel dilution are within spec; (3) Appropriate service conditions — over-the-road highway duty is friendlier to oil than severe service (heavy towing, stop-and-go, dusty environments, idle-heavy operation). Always consult your OEM maintenance schedule first — some warranties specify maximum intervals regardless of oil quality. For severe service, 15,000-mile changes are more appropriate. Oil analysis through Blackstone Labs, POLARIS, or similar is recommended to validate extended intervals for your specific application.

No — Cermax 15W-40 works in any diesel engine, treated or untreated. The STM-3 Nano Silicon Carbide in the oil will progressively build a ceramic matrix on your engine's metal surfaces during normal operation. However, for high-mileage engines or critical fleet applications where you want maximum protection immediately, we recommend applying Cerma STM-3 Diesel Engine Treatment once first — this establishes the full ceramic matrix in a single application. Then switch to Cermax 15W-40 for ongoing protection. This is different from our Cerma EVO 0W-0W, which is formulated exclusively for engines that have already received the STM-3 treatment. Cermax is the universal option; EVO is the specialized treated-engines-only option.

Yes — Cermax 15W-40 is compatible with biodiesel blends up to B20 (20% biodiesel, 80% petroleum diesel) meeting ASTM D6751 or EN 14214 specifications. The oil's additive chemistry handles the slightly increased fuel dilution and oxidation stress that biodiesel can create. For B20 applications and above, monitor oil condition more closely (via oil analysis) as biodiesel can accelerate oil degradation under certain conditions. Fully compatible with renewable diesel (HVO/hydroprocessed vegetable oil) which behaves identically to petroleum diesel.

Cermax 15W-40 delivers reliable cold-weather starting and oil circulation down to approximately -15°F / -26°C ambient temperature. For colder climates (below -15°F) or extreme cold-start conditions, consider a lower winter grade such as 5W-40 or 10W-30. For high-altitude operation (above 8,000 ft), Cermax's synthetic base stock provides excellent thermal stability and oxidation resistance — the formulation is validated for use at altitude and in wide-range temperature swings common in mountain fleet operations. For Arctic operations, always consult OEM guidance for cold-grade requirements.

Cermax 15W-40 is formulated to meet API CK-4 and major OEM diesel specifications (Cummins CES 20086, Detroit DFS 93K222, Mack EO-S 4.5, Volvo VDS-4.5, Caterpillar ECF-3, Mercedes MB 228.31). Under the Magnuson-Moss Warranty Act (15 U.S.C. § 2302), manufacturers cannot void a warranty simply because you used an aftermarket oil that meets the required specifications. Dealers must prove the oil caused the damage to deny a warranty claim. Keep receipts of your oil purchases and maintenance records. If you have specific warranty concerns, consult your OEM service manual to confirm required specifications — then verify Cermax meets or exceeds them. For extended drain intervals beyond OEM recommendations, oil analysis documentation is the industry-standard proof of suitability.