2021 2500 BH 6.4/3.73: she's home

[raven_dt]

She did pretty good for a green engine. Will fill her up and hand calculate it tomorrow. Mostly interstate 65-75mph.

 

[raven_dt]

Point of reference: Godzilla was an indicated 17.2mpg for the trip up w CC set at 75mph.

 

[Sarge33Army]

Congrats! Most 2500 owners aren't concerned with MPG. However, a few of us are interested. Our trucks will never obtain high MPG as they were built for power and work. Around town, I get 13.5 to 15mpg. My highway is 17-19.2mpg. Towing is 8.5-10.5mpg depending upon terrain, wind, and speed.

 

[raven_dt]

Congrats! Most 2500 owners aren't concerned with MPG. However, a few of us are interested. Our trucks will never obtain high MPG as they were built for power and work. Around town, I get 13.5 to 15mpg. My highway is 17-19.2mpg. Towing is 8.5-10.5mpg depending upon terrain, wind, and speed.

Sure mpg is important, especially if you tow long distances (200+ miles) and your truck has a smaller fuel tank. Our magic number is 250 miles to our campsite that we tow to 3-4 times a year. I would rather make that trip without having to navigate a fuel island if possible.

300 of 500 miles of break-in are done, anxious to she how she does pulling our TT.

 

[Myfast70]

Sure mpg is important, especially if you tow long distances (200+ miles) and your truck has a smaller fuel tank. Our magic number is 250 miles to our campsite that we tow to 3-4 times a year. I would rather make that trip without having to navigate a fuel island if possible.

300 of 500 miles of break-in are done, anxious to she how she does pulling our TT.

May want to look into the larger aftermarket tanks. I may get one just to avoid the pumps

 

[raven_dt]

14.8 hand calc...New engine, really too soon to benchmark mpg

 

[Myfast70]

Yeah, I've heard they take anywhere from 7500 up to 20k miles to break in completely but never sure whose number to go by. I know on gas engines they usually say 500 miles but opinions vary there as well. 14.8 sounds decent for a brand new truck.

 

[dm6]

Congrats! Most 2500 owners aren't concerned with MPG. However, a few of us are interested. Our trucks will never obtain high MPG as they were built for power and work. Around town, I get 13.5 to 15mpg. My highway is 17-19.2mpg. Towing is 8.5-10.5mpg depending upon terrain, wind, and speed.

You get that kind of mileage with a 6.4? That sounds better than what some of the 1500s get! That's great.

 

[raven_dt]

You get that kind of mileage with a 6.4? That sounds better than what some of the 1500s get! That's great.

I would be happy with those numbers.

 

[mwalsh9152]

14.8 hand calc...New engine, really too soon to benchmark mpg

Thats about what I saw on my first tank. It jumped about 1 MPG on the next tank, and another on the next. Averaged 16.5 on the last tank on my ride home from picking it up. Averaged 75-80 the whole way. I think I averaged 71MPH for 1200 miles, that included time for 2 fuel stops, one for lunch and a conference call as well.

 

[dm6]

Thats about what I saw on my first tank. It jumped about 1 MPG on the next tank, and another on the next. Averaged 16.5 on the last tank on my ride home from picking it up. Averaged 75-80 the whole way. I think I averaged 71MPH for 1200 miles, that included time for 2 fuel stops, one for lunch and a conference call as well.

I'm hopeful then. All I have to go by is a 600 mile round trip with half of it being mountains and getting 13. Mine has 4.10s so expect it to be 10% less mpg but if gets up to 15, I would be happy.

 

[mwalsh9152]

I'm hopeful then. All I have to go by is a 600 mile round trip with half of it being mountains and getting 13. Mine has 4.10s so expect it to be 10% less mpg but if gets up to 15, I would be happy.

I have 4:10's as well. My route home from picking the truck up was Rt81, which is far from a flat road. I havent checked my fuel economy since, as it is always mixed driving. Around town, and lots of traffic both ways to work.

 

[raven_dt]

Also, not sure how much of an impact 87 v 89 has on the 6.4 mpg. Dealer probably filled up with 87. If I ran 91 in the 7.3 I would see about a 1-1.5 mpg improvement, not enough for me to run except when towing.

 

[Squatch]

16 on highway at 70 and 13.5 overall, it was better before the 325/65r18s.

 

[dm6]

Well, the other car that we have that gets all of the use averages about 25 mpg combined. I guess when I replace that in a couple of years, I'll just get a car that gets about 40 to make up the difference for the truck. Easy solution!

 

[mwalsh9152]

I got a WTF text from my boss the other night. For some reason he didnt like my $650+ fuel bill from last month.

 

[Crusty old shellback]

Running 4.10 gears in my PW so anything over 13, I'm happy. Wish I could see above 15, but I doubt that will ever happen.