Gas vs Diesel RAM Trucks in Western South Dakota

February 24th, 2026 by

Gas vs Diesel RAM Trucks in Western South Dakota

Choosing between the 6.4L HEMI and 6.7L Cummins comes down to terrain, towing weight, and how you use your truck every day.

Why This Decision Matters in Western South Dakota

If you live in Western South Dakota, truck choice is not casual. You face crosswinds on I-90, steep Black Hills grades, canyon roads near Spearfish, and sub-zero winter mornings.

Around here, trucks are tools. If you’re shopping a RAM 2500 or RAM 3500, the real question is simple: which engine fits how you actually use your truck?

The Environment You’re Driving In

  • Long highway stretches one day
  • Steep climbs on US-16A and SD-87 the next
  • Forest Service gravel roads on weekends
  • Single-digit temperatures in January

Engine choice matters more here than it does in flat, mild conditions.

Drivers commuting between the Black Hills and Rapid City often face elevation changes and highway crosswinds that highlight real-world engine differences.

The Gas Option: 6.4L HEMI V8

The 6.4L HEMI V8, available in select
RAM 2500
and
RAM 3500 models,
delivers around 410 horsepower and 429 lb-ft of torque.

  • Lower upfront cost
  • Higher payload potential in many 2500 builds
  • No DEF fluid and simpler short-trip ownership
  • Faster winter warm-up

The Diesel Option: 6.7L Cummins

The available
RAM 2500
and
RAM 3500 diesel models
with the high-output Cummins can produce up to 1,075 lb-ft of torque.

  • Best for repeated heavy towing
  • Strong performance under mountain load
  • Exhaust brake advantage on long descents
  • Better fit for commercial-style use

The Payload Detail Many Buyers Miss

Cummins-equipped trucks weigh more up front, which can reduce payload in many RAM 2500 diesel builds.
If you tow gooseneck or fifth-wheel, pin weight can push ratings quickly.

In those cases, a RAM 3500 (often dual rear wheel) may be the safer, smarter match.

Fuel Costs and Winter Reality

Fuel Costs in South Dakota
Diesel usually costs more per gallon. MPG gains help, but for many light-tow owners the diesel premium is justified by capability, not fuel savings alone.
Winter Ownership
DEF management and emissions warm-up needs can add complexity for short cold-weather trips. Gas is often easier for stop-and-go winter use.

Comparing RAM Options Near Spearfish & Rapid City

Whether you’re based in Spearfish or commuting from Rapid City, matching the right RAM engine to your terrain and towing habits makes a noticeable difference.

Quick Decision Guide

Choose 6.4L HEMI if:

  • You daily drive your truck
  • You tow under 12,000 pounds most of the time
  • You make frequent short winter trips
  • You want lower long-term complexity

Choose 6.7L Cummins if:

  • You tow heavy regularly
  • You haul livestock or equipment
  • You drive steep grades under load
  • You want maximum torque and engine braking

Find the Right RAM Setup for Your Work

Out here, your truck earns its keep. Match engine, payload, and towing setup to your real use and every mile gets easier.

If you’re shopping from Spearfish or Rapid City, you can browse available models online before making the short drive.

Ready to compare options in person?
Browse our available RAM inventory
or contact our team to schedule a test drive.

Posted in RAM