6.4 fuel econ

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RandomRam

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2019
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6.4 Hemi
Had a rather unbelievable 21.8 MPG over 165 miles of mostly flat highway. I set the cruise for the speed limit(55 to 65 MPH) the whole way with only a couple stops. Tank before that was 14.2 MPG but had lots of city type driving along with a few miles on the beach. I’m just shy of 4000 miles now.
 

dexter

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Had a rather unbelievable 21.8 MPG over 165 miles of mostly flat highway. I set the cruise for the speed limit(55 to 65 MPH) the whole way with only a couple stops. Tank before that was 14.2 MPG but had lots of city type driving along with a few miles on the beach. I’m just shy of 4000 miles now.

You were going west to east to get the 21.8
 

Obxram

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5.7 hemi
2019 cc 4x4 4K on the clock. Best so far 18.5 average over life is 14.5. We will see. The 18.5 was cruise 60 for the whole ride.
 

RandomRam

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You got that mpg because of the tail wind.


Not much wind except for the last 40 miles or so and then it was a tail wind or a cross wind depending on where we were. Coming from the coast it was 50/50 on elevation changes. I suspect it mostly has to do with how I was managing the speed with cruise control, was able to keep MDS on for an extended period of time. Sweet spot was around 65 it seemed like. Definitely not expecting this mileage regularly.

I’m happy with my 13 MPG average. My last daily driver truck was a Tacoma with the 4.0 and 6 speed MT. With 265/70R17 KO2 tires and a 1.5” lift I saw 14 average.
 

RandomRam

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Last tank of mostly rural/mountain highway in stormy conditions averaged 13.9 over 354 miles. Very happy with this, truck is definitely settling in.
 

RBinNC

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I turned 17.3 mpg this weekend. I was really impressed. Mostly highway at 55-70 depending. Refreshing after my usual 12 around town.
 
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