Using ethanol free gas.
I have a 2014 Ram 3500 w/ 6.4 Hemi. I have been using the pure gas which is 100% ethanol Free. While it more $$ I get around 4MPG in the city and about 6 MPG on the highway, your mileage may vary. ...
Forum Discussion
westend wrote:
I have no reason to doubt the OP's results but some of his mileage differences may be due to the intrinsic construction of the engine and it's fuel management accessories and not absolutely due to the addition of alcohol.
Regardless of why or if the engine could have been designed to operate differently, the cause remains the alcohol if running it causes the mileage change the OP sees.
In other words, not being an engine designer, his conclusion about the "cause" is still valid.
I don't mean to sound argumentative. Perhaps you're just trying to explain why the theoretical BTU's and practical mileage may not line up.
