Diesel Engine Oils
✅ Ideal Applications
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Heavy-duty diesel trucks, buses, and commercial fleets.
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Industrial machinery and equipment using diesel powerplants.
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Off-road and construction vehicles operating under high load or extreme heat.
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Older and modern diesel vehicles requiring API CI‑4/CH‑4 oils.

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Description
Prado’s Diesel Engine Oils deliver heavy-duty protection with API-CI‑4/CH‑4 certification, suitable for demanding diesel applications. The range from versatile 15W‑40 and 15W‑30 multigrade oils to the high temperature SAE 50 single-grade caters to a variety of fleet, equipment, and climate conditions, offering dependable wear resistance and soot control.
🔧 Product Types
Prado’s Diesel lineup includes multigrade conventional oils engineered for heavy-duty diesel engines:
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SAE 15W‑40 – An API CI‑4/CH‑4-grade oil formulated for robust protection in heavy-duty fleet and commercial diesel engines
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SAE 15W‑30 – Offered in API CI‑4/CH‑4 specifications, this slightly lighter-grade oil provides finer viscosity control for modern and older diesel engines.
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SAE 50 – Prado’s single-grade diesel oil option, ideal for consistently hot operating conditions where a thicker film offers added protection.
🛡️ Key Benefits
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Heavy-Duty Wear Protection
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API CI‑4/CH‑4 certification ensures these oils combat engine wear effectively, thanks to robust additive packages like ZDDP for load-bearing protection.
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Stable at High Temperatures
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The multigrade formulations maintain viscosity under heavy load and thermal stress, preventing breakdown and ensuring consistent lubrication.
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Versatile Across Conditions
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15W‑40 and 15W‑30 oils suit a wide range of climates and fleet applications, balancing cold start performance with operational protection. SAE 50 shines in hot ambient environments .
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Soot and Deposit Control
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CI‑4 oils are tailored to handle soot from modern, high-output diesel engines, helping reduce deposits and improve component longevity.
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Industry-Compliant & Reliable
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Prado’s diesel oils comply with global API standards, ensuring compatibility with manufacturer warranties and worldwide performance expectations.
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🛠️ Choosing the Right Diesel Oil
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15W‑40 CI‑4 – A versatile fleet oil suitable for most climates and load conditions.
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15W‑30 CI‑4 – Offers slightly better cold-start fluidity and improved fuel efficiency in moderate-temperature settings.
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SAE 50 – Best for consistent high-temperature environments, e.g., desert construction or mining operations.
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