4 Most Common Heavy-Duty Truck Oil Change Myths Busted in Ontario
4 Most Common Heavy-Duty Truck Oil Change Myths Busted in Ontario
Posted on April 8, 2025
In the busy trucking corridors of Ontario, from Strathroy to the highways surrounding London and the GTA, heavy-duty trucks keep our economy moving. Whether you're hauling goods across the 401 or heading toward Sarnia with a loaded trailer, your truck's engine oil plays a critical role in keeping everything running. But over time, myths about oil changes have crept into everyday conversations among truck owners, leading to unnecessary maintenance—or worse, costly engine wear.
So, it’s time to bust thether you're running a single unit or managing a fleet, getting the 4 Most Common Heavy Duty Truck Oil Change Myths. Whinging the facts straight can save you time, money, and potential breakdowns.
Myth #1: You Must Change Your Oil Every 5,000 km
This one’s been around forever. While older trucks might have needed more frequent oil changes, modern diesel engines and synthetic oils have changed the game. Most heavy-duty trucks now run efficiently for 15,000 km or more between oil changes—sometimes even longer with proper monitoring. Still, always follow your manufacturer’s recommendations and consider how harsh your routes are. If you’re hauling in rough weather or up steep grades near Northern Ontario, more frequent checks are wise—but 5,000 km is no longer the golden rule.
Myth #2: Dark Oil Means It’s Dirty
Many drivers in Strathroy believe dark engine oil is automatically bad. But in reality, that darker colour is just a sign that the oil is doing its job—pulling soot and contaminants away from engine parts. Diesel oil, especially, darkens quickly due to combustion byproducts. The key isn’t the colour but the consistency and lubrication quality. Regular oil analysis is a smarter way to check engine health than relying on the colour alone.
Myth #3: More Frequent Oil Changes Equal Better Performance
It might seem like you're giving your truck a little extra love, but overdoing oil changes isn’t just unnecessary—it’s wasteful. Excessive changes don’t boost performance or extend your truck’s life. In fact, they increase costs and create more used oil waste, which isn’t great for the environment. Stick to your maintenance schedule, and your truck will reward you with solid performance and fewer trips to the service centre.
Myth #4: All Engine Oils Are the Same
Think any oil will do in a pinch? Not quite. Heavy-duty trucks need oil that meets specific standards for viscosity, additives, and wear protection. Using a generic or incorrect oil can reduce fuel efficiency and damage engine components over time. The weather in Ontario varies wildly, from humid summers to sub-zero winters, so make sure your oil is suited for local conditions. Trust certified oils approved by your truck's manufacturer—and when in doubt, ask your service technician.
Know Your Truck, Skip the Myths
Being well-informed about your heavy-duty truck’s oil needs is just as important as choosing the right rig. Don’t fall for outdated advice that could hurt your engine or your wallet. Instead, schedule your service based on usage, local conditions, and expert recommendations. Looking to keep your truck running strong or searching for a reliable workhorse to add to your fleet? Check out the best used trucks in Hamilton for your next heavy-duty investment. For trusted service and expert advice, visit Metro Freightliner in Strathroy, ON.