Liqui Moly 20424 Engine Oil

Overview

Liqui Moly Special Tec AA 5W-40 Diesel engine oil, part number 20424, is a fully synthetic low-viscosity formula for modern diesel engines. It is developed for Asian and American diesel applications that need strong wear protection, clean operation, and efficient oil flow.

Compatible With diesel applications across Chevrolet Silverado 2500 HD, Ford F-250 Super Duty, and Ram 3500 fitments, this oil is also suited for engines equipped with turbochargers and diesel particulate filters.

Key Features

• Fully synthetic 5W-40 diesel engine oil for demanding service conditions
• Low-viscosity formulation supports efficient lubrication and engine response
• Additive package helps maintain engine cleanliness and reduce wear
• Suitable for diesel engines with DPF and turbocharger systems
• Approved for extended oil change intervals when the vehicle manufacturer specifies them
• Packaged in a 20 liter plastic canister

Detailed Description

Special Tec AA 5W-40 Diesel, part number 20424, is built for diesel engines that operate under severe duty, mixed driving, or temperature extremes. The formula is aimed at Asian and American diesel platforms and appears throughout fitments for Chevrolet Silverado 2500 HD, Ford F-250 Super Duty, and Ram 2500/3500 applications, including year-round and cold-weather use cases. Its synthetic base oil and additive technology are formulated to support cleaner internal engine surfaces, stable lubrication, and efficient fuel use.

This product line is positioned for diesel engines that need a modern oil specification with compatibility for turbocharged systems and DPF-equipped vehicles. The 20424 oil is listed across a wide range of heavy-duty trucks and vans, including Ford Super Duty and Transit diesel applications, making it a practical choice for owners who need one oil specification across multiple diesel service intervals.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Excess engine wear during heavy-duty diesel operation
• Oil breakdown in severe service or extended drain intervals
• Deposits that can reduce engine cleanliness
• Lubrication demands in turbocharged diesel engines
• Cold-weather starting and year-round diesel service needs

Installation Notes

Drain the existing oil and refill to the vehicle manufacturer’s specified capacity and viscosity requirements. Verify the correct service specification for the engine before use, especially on diesel applications with DPF systems, biodiesel blends, or extended drain intervals. Follow the owner’s manual for oil change intervals and service procedures.

Quality Assurance

Liqui Moly formulates this oil for modern diesel engine requirements, with emphasis on wear control, cleanliness, and efficient operation. Part number 20424 is a synthetic motor oil designed for consistent performance in demanding diesel service.