My honest answer? If you're only comparing price and the number on the odometer, you're not comparing trucks. You're comparing two different risk profiles.
Let me give you a real example. Not long ago, a customer in Africa was hauling sand and gravel. He sent us photos of two used dump trucks he was looking at - one Euro 5, low mileage, higher price; one Euro 3, higher mileage, cheaper. His instinct was to go with the cheaper one.
Before he committed, I asked him to check three things locally: how much sulfur is in the diesel he's actually buying, whether he can get AdBlue without driving 300 kilometers, and whether the mechanics in his town know their way around DPF and SCR systems.
Turns out his fuel was dirty, AdBlue wasn't reliably available, and the local shops could fix a mechanical engine blindfolded but got nervous around aftertreatment electronics. So he went with the older, higher-mileage Euro 3 - the one with complete service records, every oil change logged.
He told me a few months later that the "older" truck had basically never let him down, while that shiny Euro 5 might have turned into a parts bill he couldn't afford. That's not me saying Euro 3 is always the right call. It means the emissions spec has to match what you can actually feed it and who can actually fix it.
Mileage lies. Paperwork doesn't.
Or at least, mileage lies more easily. You can roll back an odometer. You can't fake three years of oil change receipts, clutch replacements, and repair invoices. A truck with 600,000 km and full documentation is almost always a safer bet than one with 400,000 km and a blank history folder.
Engine hours matter too. In North American fleets, they look at the ratio between engine hours and kilometers to spot excessive idling. The number isn't a magic formula - it changes depending on what the truck was doing - but if a truck shows low mileage and high hours, that usually means it spent its life sitting in traffic or idling through cold nights. That's hard on an engine in a different way than highway miles are.
Then you open the hood and listen.
Cold start smoke color tells you something. Dipstick oil color tells you something. How the transmission engages when you pull away, whether it whines, whether it pops out of gear under load - these are the things that separate a truck that's been worked hard and maintained from one that's been worked hard and ignored.
On automated transmissions, read the fault codes. Look at the shift adaptation data. A few hundred dollars for an independent inspector to spend a couple of hours with the truck will save you thousands later. The engine and transmission are the two most expensive things to fix. Everything else is negotiable.
Emissions aftertreatment is a regional decision.
Fuel quality, AdBlue availability, and repair capability vary wildly between markets. AdBlue runs at roughly 4 to 6 percent of diesel consumption, but that number shifts by brand and duty cycle. DPF cleaning and SCR repairs cost different amounts in Lagos versus Almaty versus Lima. If your local diesel is high-sulfur, shoving a Euro 5 or Euro 6 truck into that environment isn't upgrading - it's asking for trouble.
Paint is not evidence.
Fresh paint hides more than it shows. On a dump truck, get under it and check the lift cylinders, the rear hinge pins, and the floor of the bed. Cracks in the body floor get welded over and painted. On a tractor, get on your hands and knees and look at the fifth wheel and the frame rails for hairline cracks. On a tanker, inspect the tank shell and baffles. On a mixer, look at the drum and the hydraulic drive.
A supplier you can trust will show you the before photos - the rust, the cracks, the worn parts - and the after photos from refurbishment. If all you're getting is glossy studio shots, that tells you something too.
**Finally, do the real math.**
The sticker price is the smallest part of what a used truck actually costs you. Add up purchase price, financing, fuel, maintenance, insurance, and the days the truck sits in the shop earning nothing. Then subtract what it'll be worth when you sell it.
A cheap truck that spends two weeks in the garage during its first month on the job wasn't cheap. It was expensive - you just paid for it in downtime instead of upfront.
Tires are another hidden variable. Tire prices and availability differ by country and by size, and a full set can run into the thousands. Factor that in.
