Gas vs Diesel: Total Cost, Towing Needs, and Resale Considerations

Whether diesel saves money depends on fuel prices, miles driven, towing, and maintenance. Here’s a quick model to compare.

Key Variables

• Fuel price: Diesel often costs more per gallon; varies by region/season.
• Efficiency: Diesels can deliver 15–30% better highway MPG.
• Maintenance: Diesel parts/fluids can be pricier; gas engines may have lower routine costs.
• Upfront price & resale: Diesels often cost more to buy but can hold value better for towing markets.

Cost per 100 Miles (Example)

• Gas: 25 MPG at $3.60/gal → (100/25) × 3.60 = $14.40
• Diesel: 30 MPG at $4.10/gal → (100/30) × 4.10 = $13.67

Small changes in MPG or price can flip the result—run your real figures.

When Diesel Makes Sense

• Frequent towing or hauling
• Long highway trips at steady speeds
• High annual mileage where efficiency and resale matter

When Gas is Simpler

• Mostly city driving and short trips
• Lower purchase price priority
• Limited towing needs

Practical Tips

• Consider DEF cost (diesel exhaust fluid) and service intervals.
• Check regional fuel price volatility (diesel can spike seasonally).
• For light‑duty use, modern gas engines may be cheaper overall.

FAQs

Which is cheaper long‑term? It depends on your mix of miles, prices, and maintenance. Towing/highway drivers often see diesel advantages; low‑mileage city drivers often favor gas.