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How Often Should You Do a Diesel Oil Change (Diesel Trucks)?

A person standing and smiling in front of an open MAN semi-truck

Every 5,000 to 7,000 miles or 250 to 500 hours, depending on the truck: that’s how often you should change oil on a diesel truck. But the interval for a diesel truck oil change depends on several caveats, such as how long the vehicle is used, how large the vehicle is, and more. But the […]

Planned Preventive Maintenance vs. Regular Maintenance (Trucks)

Certified Fleet Services fleet of vehicles that are ready for planned preventive maintenance work

Fleet managers and operators: your trucks are one of your business’s most valuable assets. You’d best bet that conducting planned preventive maintenance is essential to keeping your business alive and profitable. The question is how planned preventive maintenance differs from regularly scheduled maintenance. And why is being proactive about both essential to the vitality of […]

What is a Diesel Particulate Filter (DPF) System on a Truck?

A frontal view of Certified Fleet Services mobile repair truck and trailer with other trucks in the background

Black smoke: unlikely to happen with your semi-truck, right? That’s all thanks to your DPF filter. You can thank your truck’s DPF filter for clean diesel fuel burns and a cleaner exhaust system. But what is a DPF on a truck, and why is it important? A diesel particulate filter system, also known as a […]

Truck Brake Repair: 6 Indicators You Need New Brakes (Or Repairs)

A driver looking at a clipboard in a semi truck front seat while auditing his fleet management strategies he's using for his truck operation

Your truck brakes are responding a little weird. I’ll get around to truck brake repairs eventually, you might think to yourself. Not so fast. While you might be tempted to hold off on completing a brake repair on your truck for a day when you have more time, lapsing on repairing your truck’s brakes could […]

What Is A Valve Cover Gasket (Replacements, Costs, and More)?

A driver looking at a clipboard in a semi truck front seat while auditing his fleet management strategies he's using for his truck operation

What happens when a valve cover gasket stops working? Not to mention, what is a valve cover gasket? Let’s backtrack. On a good day, an engine’s pistons move up and down at hyperspeed in the cylinder. Exhaust valves and gaskets open and close just as fast. They ensure that a constant supply of hot oil […]

The Penultimate Guide to Truck Engine Rebuilds (and Overhauls)

A picture of a semi truck hauling crushed parts on a flatbed near water

When you notice your truck’s engine isn’t operating right, it’s high time for service and maintenance. But you’ll often hear terms like engine rebuild and engine overhaul thrown around. The toughest part as a diesel truck owner is knowing which to do: a truck engine rebuild or a truck engine overhaul. We’ve been in your […]

7 Tell-Tale Symptoms of a Failing or Bad Intake Manifold Gasket

A mechanic opening the hood of a large semi-truck and preparing for a truck engine rebuild

You might not know it, but intake manifold gaskets are a vital part of every diesel truck operation. This one-of-a-kind part acts as the connection point between the manifold and the engine block. The intake manifold gasket forms a seal between these two components. The gasket helps maintain proper engine performance. When it fails, engine […]

Engine Overhaul or Replace? How to Know When It’s Time to Do Each

A picture of an engine out of its chassis

Uh-oh. The check-engine light turned on. And the engine is jumping, sputtering, and smelling that funky gasoline smell again. This could mean you’re having issues with the engine in your vehicle. Fortunately, if you’re reading this, your engine might need a replacement or overhaul. What exactly is the difference between the two, though? And how […]

The Driver Vehicle Inspection Report (DVIR) and Form Made Simple

Smiling truck mechanic pointing to a clipboard with a customer looking at the clipboard and smiling while talking about planned preventive maintenance

  Fleet managers and carriers have different responsibilities. That’s why they might not always see eye to eye. While they may not always agree on the best way to use these reports, they certainly can both agree on one thing: the driver vehicle inspection report (DVIR) is crucial for running a safe, productive fleet. For […]

Drivers: Must-Know Warning Signs That Your Transmission Has Problems

Mechanic opening hood on large semi truck

It’s late at night. You’re driving on the interstate with a cup of your favorite beverage when you start to feel a lurch. Your engine’s been doing that an awful lot lately. I know I didn’t plow through a patch of ice just now, because it’s the middle of July, you might be thinking. Why […]