6.4L real world gas mileage - Page 27 - DODGE RAM FORUM - Ram Forums & Owners Club! - Ram Truck Forum
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Custom Dodge Ram Performance Mods - Engine - 6.4 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 6.4-liter HEMI® V8 engine - 410 horsepower, 429 lb-ft of torque.


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  #261  
Old 03-17-2018, 08:43 AM
redwagon redwagon is offline
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HI, how are you guys getting these millage numbers? I have a '16 powerwagon 13,500 miles and within the last month have dropped to 9.5 mpg from 13.5 in the previous two months. I asked the stealership about it when it was in for its inspection and they are clueless as there are no codes. Looking for some sort of answer as to what is going on.
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  #262  
Old 03-17-2018, 10:13 AM
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Quote:
Originally Posted by White Elephant 392 View Post
Approx 4000 miles on my 2018 2500 6.4 2wd Crew cab. Towing a 64 Eldo Vert on a HEAVY construction trailer(8600lbs total) from Tucson to Lake Havasu approx 300 miles I averaged 14.1 mpg. Ran 89 fuel and had the cruise set 95% of the trip at 69mph. After dropping the car and trailer I drove home w Cruise @75 and Averaged 18.5mpg
The evic readout is just a 'feel good' number. Try hand calculating for actual MPG.
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  #263  
Old 03-17-2018, 06:10 PM
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sanda, these were actual hand calculated numbers.
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  #264  
Old 04-20-2018, 04:37 PM
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I am super thrilled with a lot of the posts I am seeing in this thread on the 6.4 hemi. I truly wasn't expecting to get much better mpg than what I currently get with my 2000 Quad Cab V10 long bed 4x4 with 4.10 rear end - stock tires(7ish when towing a full load, 11-12ish on the hwy empty).

But after reading a lot of this thread, looks like I might end up being pleasantly surprised once the motor gets broken in once I get my 2018 6.4l.

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  #265  
Old 04-20-2018, 05:24 PM
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Quote:
Originally Posted by kirkcad View Post
I am super thrilled with a lot of the posts I am seeing in this thread on the 6.4 hemi. I truly wasn't expecting to get much better mpg than what I currently get with my 2000 Quad Cab V10 long bed 4x4 with 4.10 rear end - stock tires(7ish when towing a full load, 11-12ish on the hwy empty).

But after reading a lot of this thread, looks like I might end up being pleasantly surprised once the motor gets broken in once I get my 2018 6.4l.

All things being equal and within weight parameters the CTD will tow better and get better MPG's. The 6.4 has a much better cargo capacity than the CTD. (talking 2500's here) It's about a $9,000.00 price difference at the sticker. And out here diesel is between $.025 and $.040 a gallon more money plus the cost of the DEF fluid. Almost a toss up on cost as the CTD does get better mileage but the cost of the vehicle over 100,000 miles, the 6.4 should beat out the CDT quite a bit. In 100,000 miles just the extra sticker cost is $.09 a mile! So especially if you tow a trailer weighing 10,000 or less the 6.4 is your choice. If you tow just about anything a lot then go CTD. If you are getting a 5th wheel trailer over 10,000 skip the 2500 CDT and go 3500. Most of those 2500 CDT have a cargo capacity in the 1,900-2,100 lb range.

BTW, my best tank on the 6.4 was a close to 1,000 mile round trip with perhaps 75 of those miles in the city. 19.6 hand calculated trip. I was amazed. Normal is about 10.5-11 in town and 15-16 on highway.

Last edited by Bob1340; 04-20-2018 at 05:28 PM.
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  #266  
Old 04-20-2018, 06:16 PM
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Quote:
Originally Posted by Bob1340 View Post
All things being equal and within weight parameters the CTD will tow better and get better MPG's. The 6.4 has a much better cargo capacity than the CTD. (talking 2500's here) It's about a $9,000.00 price difference at the sticker. And out here diesel is between $.025 and $.040 a gallon more money plus the cost of the DEF fluid. Almost a toss up on cost as the CTD does get better mileage but the cost of the vehicle over 100,000 miles, the 6.4 should beat out the CDT quite a bit. In 100,000 miles just the extra sticker cost is $.09 a mile! So especially if you tow a trailer weighing 10,000 or less the 6.4 is your choice. If you tow just about anything a lot then go CTD. If you are getting a 5th wheel trailer over 10,000 skip the 2500 CDT and go 3500. Most of those 2500 CDT have a cargo capacity in the 1,900-2,100 lb range.

BTW, my best tank on the 6.4 was a close to 1,000 mile round trip with perhaps 75 of those miles in the city. 19.6 hand calculated trip. I was amazed. Normal is about 10.5-11 in town and 15-16 on highway.
Yea, been towing a 2600lb(dry) camper with a 3 horse trailer(7500-8k loaded), and our old 2000 V10 pulls it with no trouble, so figured the 6.4L Hemi was the way to go. Got the 3500 just for the increase in payload. And of course the 4.10 rear end, as am used to that with my old truck.

If we were pulling some huge 5th wheel setup, then might have considered the diesel.

But with the sort of weight I pull, and it is not that often....the 6.4L should be perfect for my needs.

And those mpg numbers you're talking about would just be heaven for me compared to what I am currently used to.

Now am just waiting for it to get here.....lol.
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  #267  
Old 04-22-2018, 12:30 PM
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I am getting 8.8 to 10.7 mpg with 488's and 40 inch tires. If you need me as an uber driver I am unavailable.....
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  #268  
Old 04-30-2018, 11:32 PM
wideopenthrottle wideopenthrottle is offline
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I just did a 40 mile trip on some hilly and flat back country roads and some highway 45 to 55 mph average, air temp was 53 degrees. I drove very conservatively and did not have a lot of traffic to deal with. The ECO light was on quite a bit. Filled the tank up to where it was at the just below the top of the fuel opening. Filled the tank up to the same level with a gas can when I got home and it took 2.3 gallons. Truck has the 6.4 with 3:73 rear, fiberglass roof height cap, AMP Powersteps, mileage is currently 4,920 miles. That calculates to about 17.3 mpg. Much better than my 2001 V-10 with a 4:10 gave me.
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  #269  
Old 05-01-2018, 11:09 PM
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Quote:
Originally Posted by wideopenthrottle View Post
I just did a 40 mile trip on some hilly and flat back country roads and some highway 45 to 55 mph average, air temp was 53 degrees. I drove very conservatively and did not have a lot of traffic to deal with. The ECO light was on quite a bit. Filled the tank up to where it was at the just below the top of the fuel opening. Filled the tank up to the same level with a gas can when I got home and it took 2.3 gallons. Truck has the 6.4 with 3:73 rear, fiberglass roof height cap, AMP Powersteps, mileage is currently 4,920 miles. That calculates to about 17.3 mpg. Much better than my 2001 V-10 with a 4:10 gave me.
I also have a 2000 V10 with a 4.10 rear end. I am lucky to get 12mpg on the hwy empty, if I drive it like a grandpa.

If I get 15mpg out of the 6.4l 4.10 rear empty, I will be ecstatic. Anything more than that and I will be in heaven.

And I didn't even buy this thing for the mpg. I bought it for the load rating/hauling power.
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