This guide breaks down the benefits and drawbacks of gas and diesel trucks… Find out which engine is right for you!
Price Differences
Diesel engines usually cost more upfront than their gas counterparts. Heavy-duty V8s and supercharged engines can cost up to $10,000 more than gas models, and will also cost more to maintain. Gas engines are cheaper but may require more frequent upkeep.
Utilizing extra Budget
As stated, purchasing a gas engine can save you a significant amount of money compared to a diesel. The additional budget can be saved, used to enhance the performance of your gas engine, or set aside to upgrade other aspects of your custom build.
Like many other aspects of custom truck builds, your ideal engine depends mostly on your driving habits and the purpose of your vehicle. There’s no clear “winner” between gas or diesel engines – both have pros and cons related to mileage, budget, maintenance, and other similar factors.
Diesel Engines
Diesel engines are ideal for high-mileage drivers and long distance trips. Compared to similar gas models, they can travel more miles per gallon and achieve a higher fuel efficiency. For drivers who are on the road for hours every day, this adds up to a significant amount of savings that can offset some of the higher costs.
Towing is also another area where diesel engines are designed to excel. Gas engines are still capable of towing, but diesels are able to perform better and are more capable of withstanding the long-term stress of hauling cargo. When towing uphill, Diesel engines can maintain speed and momentum without any extra strain.
The pure power of diesel engines is another reason they are sought after. They’re high performers with massive torque and strong acceleration, and they can be modified to become even more powerful. There’s an unmistakable sound and feel to these engines that drivers enjoy, and some truck owners choose them just for the driving experience.
2025 GMC Sierra 3500 Denali. View additional photos and aftermarket upgrades!
Gas Engines
Gas engines can meet the needs of most truck owners. They can handle lighter towing and daily commuting with no problem. If you’re planning to haul cargo in the bed such as furniture or bikes, a gas engine will be more than enough. For vehicles that aren’t under constant strain, gas engines are the ideal choice.
A major difference between the two engine types is the cost of fuel. While diesel engines are more fuel efficient, the cost of diesel fuel is significantly more expensive than gasoline. You’ll save even more on a gas engine if it does not require premium octane fuel. Gas engines themselves are also less expensive than their diesel counterparts.
If your truck is just a daily driver and isn’t used for heavy-duty work, you won’t see much difference in performance between gas and diesel engines. Without the extra expenses that come with a diesel engine, there’s room to improve your gas engine with upgrades such as cold air intakes or bed covers.
Diesel Maintenance Tips
Diesel exhaust fluid (DEF) is one of several fluids that keep your engine running properly. Keeping up with regular fluid exchanges and routine services helps to prevent major mechanical issues and can extend the lifespan of your vehicle.
Every vehicle comes with some hidden costs, stemming from either routine maintenance or unexpected mechanical failure. These won’t appear on the initial price tag, but are inevitable expenses that are necessary for any well-kept truck.
Diesel engines require more frequent replacement of the fuel filter. Gas fuel filters are often integrated into the tank system, but diesel fuel filters are attached to the bottom of the frame. Replacing the filter on time ensures higher quality fuel and keeps the diesel fuel from taking on water.
