X2
The amount of work is about the same, so the amount of fuel expended is about the same...factored by a few things
Like the BTU content of each gallon...diesel has more than gasoline
The cd (coefficient of drag) makes the next component that factors
Gear ratio down to pavement vs ICE architecture
Finally, the biggest factor of all...your right foot vs terrain...
IdaD wrote:
9 towing an 8000 lb trailer is a little optimistic. I'd expect 7-8. Not towing will depend on your driving. Maybe 16 if you do a lot of highway, 12 if more around town. Check out Fuelly.
Watch out for the outlier reports. People tend to take their best tank under ideal circumstances and declare that as their average MPG.