The Real Cost of Owning a Diesel vs Gas Truck in 2025

Posted at Tue, Jun 17, 2025 3:15 PM

Diesel vs Gas Trucks in 2025: What’s the Real Cost of Ownership?

The Real Cost of Owning a Diesel vs Gas Truck in 2025

In 2025, the debate between diesel and gas trucks isn’t just about preference — it’s about economics, performance, and long-term ownership strategy. With new emissions laws, rising fuel costs, and more efficient gas engines, what was true in 2015 may not apply today. Here’s the full breakdown of what it actually costs to own either — no fluff, just facts.

Fuel Costs: MPG & Monthly Spend

Here’s what the numbers say in 2025:

Diesel Truck: Avg. 22 MPG | Diesel cost: $4.35/gal | $198/month at 1,000 miles
Gas Truck: Avg. 17 MPG | Gas cost: $3.89/gal | $229/month at 1,000 miles

While diesel engines are more fuel-efficient, the cost-per-gallon spread has tightened, especially in Western states. Fuel economy still favors diesel, but total fuel spend may only break even depending on driving habits.

Maintenance and Repair

Maintenance is where diesel begins to show its true cost:

Diesel: DEF fluid replacement, expensive injectors, and higher oil change costs
Gas: More frequent spark plug and filter changes, but overall cheaper repairs

Estimated 5-year maintenance:

Diesel: $6,800 average
Gas: $4,200 average

Resale Value & Longevity

Diesels often retain higher resale values thanks to long lifespan engines:

2020 Diesel Trucks still sell for 70–75% of original value after 5 years
Gas trucks drop closer to 55–60%

However, newer gas trucks are closing the gap due to hybrid and turbo innovations.

Everyday Use: Which Truck Fits Your Life?

	Diesel	Gas
Cold Start Performance	Sluggish in winter	More reliable in cold
Towing Capability	Superior torque (great for 5th wheels, trailers)	Good, but limited for heavy loads
Engine Noise	Louder, more industrial	Quieter cabin
Upfront Cost	$8K–$12K higher on average	Lower entry barrier

5-Year Total Cost of Ownership

Let’s put it all together (based on 15K miles/year):

Diesel: Fuel: $11,880 | Maintenance: $6,800 | Depreciation: $14,000 → $32,680 total
Gas: Fuel: $13,720 | Maintenance: $4,200 | Depreciation: $17,500 → $35,420 total

Surprising? Diesel slightly wins long-term — but only if you drive a lot, tow often, and plan to keep your truck for 150K+ miles. Otherwise, gas is simpler and more convenient.

Final Verdict: Which Should You Buy?

Buy Diesel if: You tow frequently, drive long distances, or plan to keep the truck 7+ years.

Buy Gas if: You use your truck for commuting, errands, or don’t want complex maintenance.

Still unsure? Come visit Truck Ranch HQ in West Jordan to test drive both and talk to our team. We’ll help you pick what’s right for your budget, lifestyle, and future plans.