2024 6.6 Duramax Fuel Mileage. Does anyone have any real world data on the 2024 6.6 gas v/s 6.6 diesel fuel economy. For those wondering about fuel mileage, if i spend another $100 per month on fuel, which i don't.it would take over 8 years just to recoup the cost of the diesel.

A camper is in my future plans. For those wondering about fuel mileage, if i spend another $100 per month on fuel, which i don’t.it would take over 8 years just to recoup the cost of the diesel.