Freightliner and Western Star to Offer 6 Cummins Engines in 2027 (Including First Gasoline Option)

Daimler Truck North America expands its Cummins partnership: Freightliner and Western Star customers can choose from 6 Cummins engines for 2027 models, including the first gasoline option Freightliner will offer.

Fresh news for those shopping for new trucks 🚛🔧

Daimler Truck North America (DTNA) — the parent company of Freightliner and Western Star — just announced that 2027 models will offer 6 different Cummins engines.

And here's the interesting part: for the first time, Freightliner will offer a gasoline engine.

The 6 Cummins Engines for 2027

According to Transport Topics (March 12, 2026), Freightliner and Western Star customers can choose from:

1. Cummins X15N — Premium high-power diesel engine
2. Cummins B6.7 — Medium-duty diesel engine
3. Cummins L9N — Diesel engine for medium applications
4. Cummins ISX12N — Diesel engine (vocational/regional)
5. Cummins B6.7G — Natural gas engine
6. Cummins B6.7 Gasoline — FIRST gasoline engine for Freightliner

Gasoline Engine in a Freightliner? Seriously?

Yes, seriously. And it makes sense for certain niches:

• Local/urban delivery fleets (UPS, FedEx, municipal services)
• Vocational trucks (utilities, light construction)
• Low-mileage/light-duty applications

Gasoline is cheaper than diesel (though less efficient), and gasoline engines have lower maintenance costs in low-use applications.

Plus, with increasingly strict emissions regulations, some customers prefer to avoid DEF and complex diesel emissions systems.

Which Engine Should You Choose?

It depends on your operation:

OTR (Over-the-Road) / Long Haul

Cummins X15N — No doubt. It's the workhorse for long distances.

Regional / Vocational

Cummins ISX12N or L9N — Good power, lower weight, ideal for regional routes or vocational applications.

Delivery / Municipal / Light Construction

Cummins B6.7 (diesel or gasoline) — If you don't run many miles and want simplicity, the gasoline version might make sense.

Alternative / Sustainable

Cummins B6.7G (natural gas) — If you have access to CNG and want to reduce fuel costs, it's an option.

Importance of Pre-Delivery Inspection

Here's a fact many don't know: even trucks with 0 miles don't always come perfectly aligned from the factory.

We've seen new trucks arrive with:

• Misaligned tires
• Misadjusted suspension
• Slightly dragging brakes
• Other issues that passed factory QC but affect performance and lifespan

Recommendation: Before hitting the road with a new truck, run it through a road simulator and check the alignment.

At The Truck Savers™ (Houston, TX / Monterrey, MX):

• Free road simulator inspection (detects 100+ points)
• Precision alignment to maximize tire life and performance

Better to catch problems before they cost you money in worn tires or diesel consumption.

When Will They Be Available

2027 Freightliner and Western Star models will start production in mid-2026.

If you're in the market for a new truck, you now have more options than ever with Cummins.

Conclusion

The DTNA-Cummins partnership strengthens with these 6 engine options for 2027.

But remember: the best engine is one that's well maintained and properly configured from day one.

Before hitting the road with your new truck:

1. Run it through the road simulator
2. Check alignment on a professional alignment machine
3. Verify everything before the first 1,000 miles

Call us: (713) 455-5566 (Houston) | FREE inspection