What Type of Oil Does a Semi Truck Use?

Semi trucks, also known as tractor-trailers, are a common sight on the highways that crisscross the United States. These mammoth vehicles are used to transport goods from one place to another and require a specific type of oil to keep them running smoothly.

The type of oil used in semi trucks is usually a heavy-duty diesel engine oil with an American Petroleum Institute (API) rating of CJ-4 or higher. This type of oil is specifically designed for use in high-performance diesel engines and is formulated to handle the unique demands of these powerful machines. The CJ-4 rating indicates that the oil is suitable for engines manufactured after 2007 and is designed to reduce emissions while providing superior protection against wear and tear.

Heavy-duty diesel engine oil is available in several different viscosities, including 0W-30, 5W-30, 10W-30 and 15W-40. The viscosity rating indicates how easily the oil flows through the engine when it’s cold or hot. Choosing the right viscosity for your semi truck depends on the manufacturer’s specifications, environmental conditions and driving habits.

It’s important to check your semi truck’s owner’s manual for the recommended oil change interval, which usually falls somewhere between 15,000 and 25,000 miles depending on driving conditions. It’s also important to use an oil filter that meets or exceeds your engine manufacturer’s specifications.

In conclusion, semi trucks require heavy duty diesel engine oil with an API rating of CJ-4 or higher in order to run properly. The viscosity should be chosen based on manufacturer’s specifications, environmental conditions and driving habits.

It’s important to follow the recommended oil change interval as outlined in the owner’s manual in order to maintain optimal performance.

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Susan Delgado