Getting a truck clean is nothing like washing a car. The size alone makes it a different job, but then you’ve got road grime baked into every panel, diesel soot around the exhaust, grease all over the chassis, and mud caked in places you didn’t even know existed. It takes the right approach and the right product to get it done properly.

We wash trucks every week at our yard in Wetherill Park so we’ve figured out what works and what doesn’t. Here’s the process we use and recommend to our customers.

Why Bother Washing Your Truck Regularly

It’s not just about making it look nice. Road salt, traffic film, and industrial fallout actually eat into your paintwork and metalwork over time. A truck that gets washed regularly lasts longer, holds its value better, and costs less to maintain. You’ll also have fewer surprises come roadworthy time.

If you’re running a fleet, there’s a branding angle too. A clean truck on the highway is basically a moving billboard for your business. A filthy one sends the opposite message.

What You’ll Need

You don’t need a heap of gear, but using the right stuff makes a big difference.

You’ll want a quality truck wash concentrate. Ideally one that works as a degreaser too so you’re not messing around with two separate products. A pressure washer in the 2000 to 3000 PSI range is the sweet spot for trucks. Grab a soft bristle wash brush with an extension handle, a foam cannon or applicator for the pre wash, and some clean microfibre cloths for the cab and windows. If you can, use a drain safe wash bay.

Step 1: Pre Rinse the Entire Truck

Start with a full rinse using your pressure washer. Work from the top down. Roof, cab, sides, then chassis and wheels. You’re not trying to get it clean yet. You’re just knocking off the loose dirt and grit so you don’t scratch the paint when you start scrubbing.

Spend a bit of extra time on the wheel arches, mud flaps, and undercarriage. That’s where the worst build up sits.

Step 2: Pre Treat the Heavy Grime Areas

Before you foam the whole truck, hit the worst spots with a direct application of your truck wash concentrate at a stronger dilution. The usual trouble spots are the chassis rails where grease and road grime build up, behind the wheels where brake dust and oil collect, around the exhaust where diesel soot cakes on, and the front bumper where bugs bake in.

Let the product sit for about one to three minutes. This is where a good 2 in 1 truck wash and degreaser really earns its keep. It breaks down the surface grime and the greasy build up underneath without needing you to switch products halfway through.

Step 3: Foam the Entire Truck

Mix your truck wash concentrate according to the dilution ratio on the label. Don’t just pour extra in thinking more is better. Over concentrating wastes product and can leave residue that’s a pain to rinse off.

Load it into your foam cannon and cover the entire truck in a thick layer, top to bottom. A good product will have strong foaming action that clings to the surface and lifts dirt away from the paint. That means less scrubbing and less chance of scratching.

Step 4: Brush It Down

Grab your soft bristle brush and work through each panel. Use long, straight strokes rather than circles. Start at the top and work down so the dirty water runs off panels you haven’t touched yet.

Use a softer brush or wash mitt on the cab and painted surfaces. For the chassis, wheels, and mudguards you can go with something stiffer. Rinse your brush out regularly so you’re not dragging grit across the paint.

Step 5: Rinse Everything Off

Another full rinse from top to bottom with the pressure washer. Make sure all the product is gone. Any residue left on the paint attracts dust and leaves streaks. Check the spots people always miss like mirror mounts, door jambs, and between cab panels.

Step 6: Dry the Cab

Give the cab and painted body a quick chamois or blow dry to prevent water spots. The trailer and chassis can air dry. Nobody’s judging water marks on a mudguard.

How Often Should You Be Washing

It depends on what you’re hauling and where you’re driving.

Linehaul trucks doing highway runs can usually get away with every two to four weeks. Urban delivery trucks dealing with more stop start city grime need it weekly. And if you’re running anywhere near the coast or in salt affected areas, wash it weekly at minimum or you’ll be dealing with corrosion down the track.

A lot of our fleet customers find that sticking to a regular wash schedule actually saves money. Less paint damage, fewer rust issues, lower maintenance costs overall. It pays for itself.

Choosing the Right Product

The biggest decision is whether you need a separate degreaser or whether a 2 in 1 can handle both jobs. For most operators we talk to, a concentrated 2 in 1 truck wash and degreaser is the most practical option. It cuts through traffic film and grease in a single step which saves time and product.

We built Blue Power 2 in 1 for exactly this. It’s Australian made, has a high alkaline cleaning strength that cuts through grease, oil and road grime fast, and the foaming action lifts contaminants off the surface so you’re not scrubbing as hard. It even smells decent with a fresh citrus fragrance, which is a bonus when you’re washing trucks all day.

It’s concentrated so you can dial the strength up or down depending on the job. Use it at 1:40 to 1:60 for a regular truck wash, or go stronger at 1:10 to 1:20 for heavy chassis degreasing. One drum covers every job.

Available in 5L and 20L from our online store, with 200L drums and 1000L IBC options for larger fleets. We deliver across Sydney and Australia wide.

Finish the Job Right

Once the truck’s clean, it’s worth going the extra step if you want it looking sharp. A coat of Liquichem Silicone Tyre Shine on the tyres and a wipe down of the dash with Liquichem Dash and Trim Restorer makes a big difference to the overall presentation. And a quick pass over the windows and mirrors with Liquichem Chrome and Glass Cleaner finishes it off properly.

Got questions about truck washing or want to try Blue Power? Browse our Autoclean range or get in touch. We’re always happy to help.