2026 Jeep Wagoneer (which for 2026 is folded into the Jeep Grand Wagoneer lineup as the base/full-size SUV), here’s how city and highway fuel economy looks based on the most recent available figures and reasonable estimates: 

🚗 2026 Jeep Wagoneer / Grand Wagoneer (Gas-Engine SUV)

Jeep streamlined the Wagoneer name into the Grand Wagoneer lineup for 2026, using the same 3.0 L Twin-Turbo Hurricane inline-6 engine in base and higher trims. 

Estimated EPA Fuel Economy (based on 2025 Wagoneer ratings with the same engine):

• City: ~16 mpg

• Highway: ~23 mpg

• Combined: ~~19-20 mpg

📊 Notes:

• These figures are based on 2025 Wagoneer ratings on the same-ish powertrain and are the best proxy until Jeep publishes official 2026 EPA numbers. 

• A real-world highway test by Car and Driver of a Wagoneer (similar powertrain) delivered ~22 mpg at steady highway speeds (~75 mph). 

• Some automotive sites estimate slightly higher mpg with the new Hurricane engine (~18-19 city / ~24-26 highway for certain configurations), though official EPA figures aren’t yet posted. 

⚡ Electrified Wagoneer S (Separate Model)

There’s also the 2026 Jeep Wagoneer S — a more electric-oriented variant distinct from the standard Wagoneer/Grand Wagoneer SUV. That model’s EPA efficiency is measured in MPGe (electric equivalent): 

• City: ~100 MPGe

• Highway: ~85 MPGe

• Electric range: around ~290+ miles (EPA) 

This reflects the electric Wagoneer S’s dual-motor battery-electric setup rather than the conventional gasoline SUV.

📌 Summary

Let me know if you’d like a comparison of the Wagoneer’s mpg/MPGe with similar large SUVs (like the Cadillac Escalade or Ford Expedition) or a breakdown by trim level!