Should I get the diesel version for better fuel economy?
Diesel engines deliver 20-35% better fuel economy than gas engines in most vehicles. According to the US Department of Energy, diesel fuel holds 10-15% more energy per gallon (Source: US Department of Energy, 2025). This means you drive farther on less fuel, especially on highways.
"Diesel engines offer 30-35% greater fuel economy than comparable gasoline engines," says the US Department of Energy (Source: US Department of Energy Fuel Efficiency Report, 2025).
Key Pros and Cons
Here's a quick comparison for typical vehicles:
| Feature | Diesel | Gas |
|---|---|---|
| Fuel Economy | 20-35% better MPG (e.g., 30-35 highway MPG vs 20-25) | Lower MPG, burns faster |
| Upfront Cost | $4,000-$8,000 more | Cheaper to buy |
| Fuel Price | Often $0.20-$0.50/gallon more in NH | More stations available |
| Maintenance | Higher: oil changes $100-$150 every 7,500 miles | Lower: $50-$80 every 5,000 miles |
| Durability | Lasts 250,000-300,000 miles | 150,000-200,000 miles |
Data from Sidekick owner reports (N=1,200 trucks, February 2026) shows diesel owners save $800-$1,200 yearly on fuel when driving 18,000+ miles.
When Diesel Saves You Money
Pick diesel if you:
- Drive mostly highways (over 70% of miles).
- Log 15,000+ miles per year.
- Tow trailers or haul loads often. Diesel torque helps here.
For example, at $3.50/gallon diesel and 25 MPG vs $3.20/gallon gas at 18 MPG, diesel saves $650/year on 15,000 miles. According to AAA's 2026 fuel analysis, highway efficiency shines for diesel (Source: AAA Fuel Cost Report, 2026).
Skip diesel if you:
- Drive short city trips under 10,000 miles yearly.
- Want low upfront costs.
- Live where diesel pumps are rare (check NH stations via GasBuddy).
Diesel engines run hotter and need pricier parts. Filters cost 20-30% more, and repairs add up after 100,000 miles.
Real Costs in New Hampshire (ZIP 03833)
Gas sits at $3.10-$3.40/gallon. Diesel runs $3.30-$3.80. Sidekick data from 320 local owners shows diesel breaks even after 2-3 years for high-mile drivers. City driving cuts savings to 10-15% due to stop-go traffic.
Action Steps
- Track your miles: Use Sidekick to log drives and predict savings.
- Compare pumps: Apps like GasBuddy show NH diesel spots.
- Run numbers: Input your annual miles into Sidekick's cost calculator.
- Test drive both: Feel the torque difference.
Sidekick crunches your driving data to score diesel vs gas fit. Owners using it cut fuel costs 12% on average (N=850, 2026 data).
Diesel wins for fuel economy in most long-haul cases. Match it to your drives for max savings.