Buy diesel if you tow heavy regularly, drive enough highway miles to keep the emissions system healthy, and plan to keep the truck long term. Buy gas if it is a daily driver with short trips, you tow occasionally, or the 10000 to 15000 dollar diesel premium stretches your budget.
- Diesel wins for heavy towing, fuel economy, longevity, and resale value
- Gas wins on purchase price, maintenance costs, and short trip friendliness
- Modern diesels hate short city driving, DPF problems follow
- The diesel premium is 10000 to 15000 dollars new
- Use the cost calculator to find your break even mileage before deciding
"Should I get the diesel?" I hear it weekly. The answer depends entirely on how you use the truck, and most buyers get it wrong because they focus on fuel economy and ignore everything else. Let me lay it out the way I explain it in the shop.
Where diesel wins
Towing. This is the whole point. A diesel makes its torque down low, right where you need it pulling a trailer up a grade. A gas truck can tow the same trailer on paper, but it will be screaming at 5,000 RPM doing it while the diesel lopes along at 2,000. If you tow heavy (over 10,000 lbs) regularly, diesel is not a preference, it is the right tool.
Fuel economy. 20 to 30 percent better, roughly. On a truck doing 30,000 km a year, that is real money.
Longevity. A maintained diesel routinely sees 400,000 to 500,000 km. Gas trucks can get there too, but fewer do.
Resale. Diesel trucks hold value better, especially in the used market where buyers specifically hunt for them.
Where gas wins
Purchase price. The diesel option is $10,000 to $15,000 more new. That is a lot of fuel.
Maintenance costs. Oil changes cost double (more oil, more expensive filters). Fuel filters every 20,000 km. DEF fluid. When something breaks, diesel parts cost more. A gas truck is simply cheaper to keep running.
Short trips. This is the big one people miss. Modern diesels with DPFs hate short city driving. If your truck never gets hot, the DPF clogs, regens fail, and you get repair bills. A diesel that only does grocery runs is a diesel that will punish you.
Simplicity. No DEF, no DPF, no EGR cooler to crack. A gas V8 is a simpler machine with fewer expensive surprises.
The decision, simplified
Buy diesel if: you tow heavy regularly, you drive enough highway miles to keep the emissions system happy (at least a good highway run weekly), and you plan to keep the truck a long time.
Buy gas if: the truck is a daily driver with short trips, you tow occasionally or light, or the diesel premium would stretch your budget. A gas 3/4 ton with modern gearing tows a 8,000 lb trailer just fine.
Run the numbers
Use our diesel vs gas cost calculator with your actual prices and mileage. It will tell you the break-even point in miles. If that number is beyond how long you will own the truck, the answer is gas.
Frequently asked questions
Should I buy a diesel truck as a daily driver?
Usually not. Short trips clog the DPF and you pay diesel maintenance costs without getting the towing benefit. A gas truck is the smarter daily driver unless you also tow regularly.
How long until diesel pays for itself?
It depends on fuel prices and your mileage. Use our diesel vs gas calculator with your real numbers. If the break even mileage is beyond how long you will own the truck, buy gas.
Do diesel trucks last longer than gas?
Generally yes. A maintained diesel routinely reaches 400000 to 500000 km. But longevity only matters if you keep the truck that long.