What Difference Does a Diesel Engine Make?

Increasingly less popular these days, diesel engines live on borrowed time despite all the technologies that are being implemented to reduce their emissions. Of course, they have considerable advantages: better energy, superior torque, higher towing capacity, etc. That’s why some buyers show continued interest in them, even if they are used.

But before going ahead and buying one, you should know what you’re getting into, because a diesel engine has a lot of special features and things to watch out for to maintain an optimal operation.

First, it’s true that this type of engine consumes less fuel, but the price gap between diesel and gas often voids the diesel engine’s efficiency, and is sometimes more expensive to run in the end. You can make calculations based on your preferred model and driving habits (you won’t benefit from diesel if driving less than 15,000 km per year), but remember that gas prices can vary widely from one month to another, and from one year to another also.

On the road, diesel engines have a different sound and behaviour compared to gas engines. Luckily, the recent examples don’t emit tractor noises and smoke like they used to. A road test before buying is crucial to see if these little details will annoy you or not.

Then, you must also consider the maintenance and repair costs. They will vary depending on the vehicle’s make and history, but they are typically higher with a diesel engine. Among other things, you must regularly fill the urea tank to control the harmful exhaust emissions. It must be checked and topped during with every maintenance, and its filler hole cap is blue most of the time. Warning: never put urea in the fuel tank!

Diesel engines do deserve their reputation for durability, but the way they are cared for has a great impact on their longevity. Also note that some models have had their fair share of problems, like the Ram's EcoDiesel V6 (failed or seized engines, “check engine” light on, and urea fluid system failure). Taking an extended warranty that covers these risks would be wise, but don’t forget to include that expense in your cost-efficiency calculations.

Another important detail, especially in Quebec: using a bloc heater in the winter is vital. Since this type of engine uses pressure and heat to create an explosion, very low temperatures are sure to prevent your vehicle from starting.