When to Change Your Diesel Truck’s Oil

Most semi trucks can go about 25,000 miles between oil changes, while some require maintenance as often as every 10,000 miles. Consult your truck’s operating manual for specific oil change intervals.

Here’s are some things to consider:

• Manufacturer Recommendations:

• Owner's Manual: Your truck's owner's manual is the primary source of information for recommended oil change intervals. It's crucial to consult this document for the specific guidelines for your engine.  
• Engine Type: Different engines have different oil requirements and recommended change intervals. Older engines may need more frequent changes than newer, more efficient ones.  

• Oil Type and Quality:

• Conventional vs. Synthetic: Full synthetic oils generally offer superior protection and can last longer than conventional or synthetic blend oils.  
• Oil Analysis: Regular oil analysis can provide valuable insights into the condition of your oil and help you determine if it's still performing effectively or needs to be changed.  

• Operating Conditions:

• Heavy Loads and Long Hauls: If your truck frequently carries heavy loads or travels long distances, the oil may degrade faster and require more frequent changes.  
• Extreme Temperatures: Operating in very hot or cold climates can put extra stress on the oil and shorten its lifespan.  
• Driving Habits: Aggressive driving habits, such as frequent acceleration and braking, can also accelerate oil degradation.  

What Semi-Truck Oil Should You Use?

Check your owner’s manual for manufacturer's recommended oil type, viscosity, and specifications; This is the primary source of information for your specific engine.

The oil you use will depend on a variety of factors including:

• Engine age and condition – older engines may require a high mileage formula.
• Operating conditions – The climate you operate in can affect oil choices. Colder climates generally require lower viscosity, while hotter climates may need higher viscosity for optimal protection.
• Applications - If your truck frequently carries heavy loads or travels long distances, a high-quality synthetic oil is recommended for maximum protection.
• OEM Approvals - Some engine manufacturers have their own oil specifications and approvals.

Popular semi-truck oils include:

• Shell Rotella T6: A popular full synthetic option known for its excellent wear protection and performance in various conditions.
• Mobil Delvac 1: Another top-tier full synthetic oil offering extended drain intervals and superior protection.
• Valvoline Premium Blue: A high-quality oil endorsed by Cummins, suitable for a wide range of diesel engines.

How Much Does a Semi-Truck Oil Change Cost?

There are three main costs to an oil change:

• Labor Costs: This is the biggest variable. Labor rates differ significantly between shops and regions. Expect to pay anywhere from $100 to $300 or more for labor alone, depending on the shop's hourly rate and the time it takes to complete the job.  
• Oil Costs: Semi-trucks require a significant amount of oil, typically around 10-15 gallons. The cost of oil will vary depending on the type (conventional, synthetic blend, or full synthetic) and the brand. Expect to pay anywhere from $100 to $300 or more for the oil itself.  
• Filter Costs: Oil filters for semi-trucks can be expensive. Expect to pay around $20 to $50 per filter.

Can You Change Your Own Diesel Truck Oil?

Yes, many people change their own oil to save on labor costs, but there are some things to consider before doing it yourself.

• Oil Selection is Critical: Don't just grab any oil off the shelf.  Your truck's engine has specific requirements. Consult your owner's manual and research thoroughly to ensure you're using the correct oil type, viscosity, and specification for your engine, application, and climate.  Using the wrong oil can lead to serious engine damage.
• Experience Matters: Working on heavy or medium-duty engines is significantly different than working on a car.  While DIY car maintenance experience is helpful, it doesn't fully prepare you for the complexities of truck maintenance.  If you're not comfortable with heavy equipment, it's best to leave this to the professionals.
• Meticulous Record Keeping is Essential:  Detailed maintenance records aren't just for your peace of mind; they're crucial for maintaining your truck's warranty.  Keep a log of every oil change, including the date, mileage, oil type and brand, filter information, and any other relevant details.  Lack of proper documentation could void your warranty.
• Quantity and Disposal: Semi-truck engines hold a lot of oil – often up to 15 gallons, depending on the engine.  Make sure you purchase an adequate supply and have a plan for responsibly storing and disposing of the used oil.  Don't just dump it down the drain!  Many auto parts stores and recycling centers accept used oil for proper disposal.
• Tools and Equipment: This isn't a quick trip to the auto parts store for a wrench and a filter.  You'll likely need specialized tools, including a large drain pan, heavy-duty wrenches, a filter wrench designed for truck filters, and possibly a pump to transfer oil.  Depending on your truck model, you may also need heavy-duty jacks and jack stands.
• Safety First: Working with heavy duty trucks is inherently dangerous.  Always use proper safety equipment, including eye protection and gloves.  Be extremely cautious when working underneath the truck, ensuring it's properly secured.  Have a plan in place for spills or accidental exposure to oil.
• Time Commitment:  Changing the oil on a semi-truck is a time-consuming process.  It's significantly more involved than a car oil change.  Be realistic about the time commitment required and ensure you have adequate time to complete the job safely and correctly.
• Risk Management: Things can go wrong.  Have a plan for contingencies, such as spills, stuck filters, or other unexpected issues.  Do you have the resources and knowledge to handle these situations?

Will Changing Your Own Oil Void the Semi-Truck’s Warranty?

Changing your own semi-truck oil will generally not void the warranty but some warranties will have exceptions, so it’s important to read the fine print. Keep in mind that any damage caused by improper servicing can void it, so it’s important to make sure you know what you’re doing.

Here's a couple factors to consider:

• Read the Fine Print: Your truck's warranty documents will outline the specific requirements for maintaining coverage. Pay close attention to the sections on maintenance and service.
• Warranty Terms: Using additives could void the manufacturer’s warranty.
• Maintenance Records: If the warranty allows you to do your own maintenance, meticulous record-keeping is crucial. Keep detailed records of every oil change, including the date, mileage, oil type used, and filter information. This documentation will be essential if you need to make a warranty claim.

Should I Use an Oil Additive?

While additives might promise to prolong the duration of your vehicle’s oil tank, using too many additives can interfere with the balance of a lubricant’s formulation.

Here are some things to consider:

• Engine Manufacturer Recommendations and Warranties: The most critical factor is what your engine manufacturer recommends. Many manufacturers explicitly discourage the use of aftermarket oil additives. Using them could void your warranty. Always consult your owner's manual and/or contact the engine manufacturer directly for their stance on additives.
• Oil Compatibility: Not all additives are compatible with all oils. Some additives can react negatively with certain oil formulations, potentially leading to sludge formation, reduced oil performance, or even engine damage.  
• Conflicting Additives: Modern diesel engine oils already contain a complex blend of additives designed to protect the engine. Adding more additives can disrupt the delicate balance of these existing additives and may actually be detrimental.  
• Lack of Regulation: The oil additive market is not as tightly regulated as the oil market itself. Some additives may make claims that are not scientifically substantiated. There's a risk of using an additive that doesn't provide any benefit or could even harm your engine.
• Potential for Harm: In some cases, oil additives can actually be harmful. They might cause seals to swell, interfere with filter performance, or contribute to increased engine wear.  

How to Extend the Life of Your Semi-Truck Oil

While it’s important to observe manufacturer recommended maintenance intervals, there are some ways to extend the life of your oil.

• Use High-Quality Oil:

• Synthetic Oils: Opt for full synthetic oils whenever possible. They offer superior protection against wear, oxidation, and thermal breakdown compared to conventional or synthetic blend oils.  
• Manufacturer Specifications: Always adhere to the oil specifications recommended by your engine manufacturer. Using the correct oil type and viscosity is crucial for optimal performance and engine longevity.  

• Regular Oil Analysis:

• Monitor Oil Condition: Periodic oil analysis can provide valuable insights into the condition of your oil and your engine. It can help you determine if your oil is still performing effectively or if it needs to be changed sooner than the recommended interval.  
• Identify Potential Problems: Oil analysis can also detect early signs of engine wear or other issues, allowing you to address them before they become major problems.  

• Proper Filtration:

• High-Quality Filters: Use high-quality oil filters that are designed to effectively remove contaminants from the oil.  
• Regular Filter Changes: Change your oil filter at every oil change, or more frequently if recommended by the manufacturer or indicated by oil analysis.

• Optimize Operating Conditions:

• Avoid Extreme Conditions: Minimize operation in extreme temperatures or under heavy loads whenever possible. These conditions can put extra stress on the oil and accelerate its degradation.  
• Proper Warm-Up: Allow your engine to warm up properly before putting it under heavy load. This ensures that the oil reaches optimal temperature and can effectively lubricate engine components.

• Maintain Proper Engine Conditions:

• Address Leaks: Repair any oil leaks promptly to prevent oil loss and ensure adequate lubrication.  
• Cooling System Maintenance: Keep your engine's cooling system in good condition to prevent overheating, which can break down the oil. 

• Follow Recommended Maintenance Intervals:

• Oil Change Intervals: Adhere to the oil change intervals recommended by your engine manufacturer. These intervals are based on factors like engine type, operating conditions, and oil quality.  
• Other Maintenance: Perform other routine maintenance tasks, such as air filter changes and fuel system maintenance, to ensure that your engine is running efficiently and not putting undue stress on the oil

Looking for a Service Shop to Get Your Oil Changed at?

The Pete Store has locations across the East Coast with expert technicians that can get the job done right. Schedule your service today!