If you rely on your diesel day in, day out, servicing it regularly is the difference between a truck that keeps running, and one that lets you down when it matters most. From long hauls and heavy loads to rough tracks and city traffic, your truck works hard, and every kilometre takes its toll.
A proper service keeps everything ticking over, catches issues early and ensures your diesel stays strong and reliable, whether you’re cruising highways or hitting backcountry trails.
So, how often should a truck be serviced to keep it running like new? Stick around — we’re about to answer this and cover all the service tips your diesel actually needs.
Why diesel trucks need a different servicing standard
Diesel trucks are built tough, but they cop a different kind of punishment. Think about it: they run hotter, work under higher pressure, and often haul or tow huge loads that would leave a petrol engine gasping for air.
And that’s not all. When you mix in long country hauls, off-road dust, and city stop–start traffic, your diesel’s putting in serious overtime. That’s exactly why diesel trucks need a different servicing standard, one that keeps every component running clean, cool and efficient under all that pressure.
How often should a truck be serviced?
Alright, we’ve covered the why. Now let’s get into how often your diesel really needs a service. Here’s the golden rule: most diesel trucks need a service somewhere between 10,000 and 40,000 km, with the average sitting around 20,000 km. Or roughly every 6–12 months, depending on how you use them.
Think of it this way. If you’re towing, off-roading or running a work truck that’s under load most days, aim for the shorter service interval. For highway cruisers or light-duty vehicles, you can usually stretch it towards the upper range.
But basically, the key is to check your logbook regularly (every manufacturer has its own schedule). And trust your truck if it starts feeling sluggish or a bit off. A change in sound, performance or fuel use is your cue to get it checked before small issues become big ones.
What’s included in a typical truck service?
A proper truck service goes way beyond an oil and filter change. At Willy’s Workshop, our experienced truck mechanics check every critical system to make sure your diesel’s performing at its best.
Here’s what’s covered in a standard truck service:
- Oil & filter changes: Fresh oil keeps your engine lubricated, reduces friction, and prevents premature wear and tear. A clean filter traps dirt and debris, which helps your engine breathe easier and run smoother for longer.
- Fuel filter replacement: Diesel needs clean fuel to perform efficiently. Replacing the fuel filter prevents clogs, keeps injectors clean, and ensures smooth, consistent power delivery.
- Diagnostics & fault checks: Modern trucks have complex electronics. A full diagnostic scan picks up early warning signs before they turn into major problems, saving you downtime and costly repairs.
- Suspension & steering inspection: Heavy loads, rough roads and off-road trails put extra strain on your suspension. By checking bushes, shocks and steering components, you keep handling tight, safe and predictable.
- Brake system check: Reliable brakes aren’t negotiable. Inspecting pads, discs, lines and fluid ensures you stop exactly when and where you need to, even under full load.
- Transmission service: A smooth gearbox makes driving easier and protects your engine. Servicing the transmission keeps shifts crisp, prevents slipping and extends the life of your drivetrain.
- DPF, EGR & AdBlue system check: Diesel emission systems are critical for efficiency and compliance. Cleaning and maintaining these components prevents blockages, reduces regen cycles, restores lost power and keeps your truck running clean.
What are the warning signs you’re pushing it too far?
Even with regular servicing, there will come a time when your truck starts sending signals that it’s overdue for attention. Ignoring these warnings is a fast track from a simple service to a costly repair. Or even worse, unexpected downtime. Keep an eye out for:
Hard starts or sluggish acceleration
If your truck struggles to fire up or feels slow off the line, it’s a sign the engine isn’t running as efficiently as it should. Early attention here keeps small nagging issues from turning into bigger engine problems.
Noticeable drop in fuel economy
A sudden spike in fuel use can mean your engine or fuel system is under stress. Servicing restores smooth fuel delivery, and this helps you save money at the pump.
DPF warning lights or frequent regens
Frequent regen cycles, blocked filters or flashing DPF lights aren’t just a pain in the backside. They’re warning signs that your emissions system is under strain. Letting it slide can lead to serious engine issues.
Rough idling or vibrations
Shaking, rattling or uneven idle can point to worn components, from injectors to suspension mounts. Catching this early keeps driving smooth and stops extra damage.
Loss of power or ‘limp mode’ kicking in
Limp mode is your truck’s built-in safety system. When the engine or transmission detects a serious problem, it limits power and locks the vehicle into a lower gear to prevent further damage.
So if your truck goes into limp mode, it’s a clear signal that something needs attention. Getting it serviced promptly can prevent costly repairs and keep your engine and transmission safe.
What happens if you skip a service?
Skipping a service might seem like no big deal… until it hits you in the wallet. Over time, old oil loses its lubricating power, filters get blocked and critical components start running hotter than they should.
And that’s when small issues start to snowball into major headaches. Headaches like turbo failures, injector problems or a blocked DPF can all land you with a costly repair job.
On top of that, skipping scheduled maintenance can void warranties and chip away at your truck’s resale value. This is why regular servicing isn’t just a routine. It’s insurance for your engine, your wallet, and your peace of mind.
Keep your truck in top gear with Willy’s Workshop
A properly serviced truck isn’t just trouble-free. It’s smoother on the road, more fuel-efficient, and ready for every load or adventure you throw at it.
Regular servicing protects your engine, brakes and transmission, making sure you’re not hit with a hefty repair bill or stuck on the side of the road. That means more jobs completed, less stress on the road, and more money in your pocket.
At Willy’s Workshop, our diesel specialists know what your truck needs to stay strong and reliable. No cutting corners, just results that keep your diesel delivering maximum grunt.
Don’t wait around for warning lights or limp mode to remind you. Book your truck in today and experience the difference a proper service makes, from the first kilometre to the last.
