SEAOIL Deomax Premium Multi-Grade Diesel Engine Oil – SAE 15W-40 API CI-4/SL (1L / 4L)

Keep your engines running at peak thermal efficiency and safeguard your fleet with SEAOIL Deomax Premium Multi-Grade Diesel Engine Oil 15W-40. Modern commercial diesel engines—whether hauling heavy payloads across long distances or managing stop-and-go urban logistics—generate immense internal heat, mechanical shear, and high soot loads. SEAOIL Deomax is engineered with an advanced formulation that creates a resilient protective barrier over high-friction moving parts, actively keeping your engine running cool and clean.

Its premium multi-grade formula targets carbon management directly. By arresting soot particles early and keeping them safely suspended in fluid, it stops the formation of abrasive clusters that can score cylinder liners, wear down valve-trains, or clog filters.

Core Performance Features:

• API CI-4 / SL Dual Specification: Provides specialized, heavy-duty protection for high-emission diesel engines while remaining backwards-compatible for mixed-fleet fuel/lubricant optimization.

• Advanced Soot Handling & Sludge Defense: Premium dispersant additives wrap around combustion byproducts, keeping internal components free of power-robbing varnish, lacquer, and sludge.

• Superior Shear Stability: Resists permanent viscosity breakdown under heavy workloads and high operating temperatures, ensuring consistent oil film thickness and steady oil pressure.

• Corrosion & Acid Defense: High reserve alkalinity neutralizes aggressive combustion acids, shielding internal steel and copper alloys from chemical wear.

• All-Weather Performance: Engineered for fast oil circulation during cold startups, transitioning smoothly to full boundary layer defense at peak running heat.

Typical Applications:

• Turbocharged and naturally aspirated high-load diesel engines requiring an API CI-4, CH-4, or CG-4 lubricant.

• Commercial road transport vehicles, passenger utility vehicles, delivery vans, and light-to-medium trucks.

• Mixed-fleet operations requiring an oil that safely bridges diesel and gasoline performance specifications (API SL).

Packaging & Shipping Specifications (WooCommerce Variations)

This product features ergonomic retail and commercial packaging equipped with tamper-evident caps and precise volume fill markers:

Variation 1: 1-Liter Bottle

• Packaging Type: Rigid High-Density Polyethylene (HDPE) Bottle with integrated side-grip texture.

• Net Volume: 1 Liter (1L)

• Approx. Net Fluid Weight: ~0.88 kg

• Approx. Gross Shipping Weight: ~0.95 kg (Includes retail bottle packaging)

• Best For: Top-ups, compact maintenance kits, and single-cylinder industrial engines.

Variation 2: 4-Liter Gallon

• Packaging Type: Heavy-Duty HDPE Gallon Jug with a wide, robust top handle for controlled pouring.

• Net Volume: 4 Liters (4L)

• Approx. Net Fluid Weight: ~3.52 kg

• Approx. Gross Shipping Weight: ~3.80 kg (Includes protective container for parcel freight calculations)

• Best For: Complete crankcase oil changes in light commercial vehicles, SUVs, and utility trucks.

Technical Specifications Table