The age-old question for anyone towing a travel trailer or fifth wheel: gas or diesel? While online forums buzz with opinions, this article dives into the data to determine if there’s an objectively better choice for towing and if a diesel engine truly justifies the extra cost. We’ll compare upfront costs, fuel economy, maintenance, towing performance, engine lifespan, depreciation, and total cost of ownership to help you make an informed decision.
Upfront Costs: Gas Takes the Lead
Gas trucks generally have a lower initial price tag. Expect to pay a premium of $8,000 to $11,000 (or more) for a diesel counterpart. This price difference stems from the diesel engine’s robust construction, higher towing capacity and torque, and more complex emissions system. However, diesels often retain value better due to their longer lifespan.
Comparing price tags of gas and diesel trucks
Fuel Efficiency: It’s Complicated
While diesel engines boast better fuel economy due to higher energy density, the lower cost per gallon of gasoline and the added expense of diesel exhaust fluid (DEF) often level the playing field. A key advantage of diesel for long-distance towing is fewer fuel stops. Fuel cards can offer significant savings for diesel owners, often providing fleet pricing at truck stops. These savings can offset the higher fuel costs and offer added benefits like safer fueling locations and high-flow pumps.
Maintenance: Gas Wins on Simplicity
Gas engines generally have lower maintenance costs. While diesels lack spark plugs, their complex emissions systems, particularly the Exhaust Gas Recirculation (EGR) system, can lead to costly repairs over time. Finding qualified diesel mechanics can also be challenging. Diesel engines typically have longer intervals between oil changes (7,000 miles vs. 5,000 miles for gas), but the higher oil capacity and cost of synthetic oil can offset this advantage.
Towing Power: Diesel’s Domain
Diesel engines excel in towing thanks to their superior torque, integrated exhaust brake, and better fuel economy under heavy loads. This makes them ideal for heavy RVs or long-distance travel. Gas trucks might offer higher towing capacities due to payload, but their lower torque and lighter weight can make them more susceptible to wind and passing vehicles when towing.
Engine Lifespan: Diesel’s Longevity
Diesel engines are renowned for their durability, often exceeding 200,000 miles. Their robust construction and the less corrosive nature of diesel fuel contribute to their extended lifespan. This longevity often translates to higher resale values. While modern gas trucks have improved significantly, diesels remain the champions of long-term use.
Depreciation: A Surprising Twist
While diesel trucks hold higher resale values, the initial price difference and higher maintenance costs can negate this advantage. Studies indicate that the higher resale value might not fully compensate for the increased ownership costs, potentially taking hundreds of thousands of miles to break even.
Total Cost of Ownership: The Verdict
While older studies favored diesel for total cost of ownership, more recent analyses suggest that gas engines might be more economical over a vehicle’s lifespan. Factors like higher diesel fuel prices and increased maintenance costs contribute to this shift. Online calculators can help you estimate the total cost of ownership based on your specific needs and driving habits.
Choosing the Right Engine for Your Needs
The ultimate decision hinges on your individual needs and priorities. Diesel remains the preferred choice for heavy-duty, long-distance towing and for those seeking maximum vehicle longevity. However, gas engines offer a more affordable entry point, simpler maintenance, and potentially lower overall ownership costs, making them a compelling option for lighter towing and everyday use. Consider your budget, towing requirements, and desired vehicle lifespan to determine the best fit. Factors like travel style and tolerance for DIY repairs also play a crucial role.
