Skeptical... I've been hearing a lot lower mpg's (than the Morgan's are reporting) for both Ford and GM. Since 2010 (DPF/DEF intro), all of these diesels have been using fuel to help control emissions, and emissions control has been the over-riding mission imperative for keeping diesel on-road vehicle production alive. And, few people know how to record and calculate fuel economy correctly, due in part because most of us don't drive consistently enough to make statistical sense to produce representative numbers (i.e. all interstate or all local, for example).
Most of us drive in a mix of overlapping speeds/seasons/temperatures/road & weather conditions, which complicates a conclusion about mpg's. Here in the north, there's summer and winter fuel to consider - with varying fuel blends as the fuel companies transition to either summer/winter fuel. I'd need to see a half dozen calculated contiguous tanks of fuel over a fairly short period of time. I record nearly every tank of fuel that goes through Lil Red, along with speeds and road types. I'm pretty sure about what it gets, and under what conditions.
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Originally Posted by DieselDavy
