Mileage of 6.4 Hemi

[Wills6_4_Hemi]

I noticed a recent post on mileage of 3/4 ton gas trucks. My truck is a DRW 1 ton CC LB 4x4 6.4 Hemi with 3:73 years. Just returned from a 500 mile trip pulling a 9k 5er and we got 8.9 mpg. I stayed between 62-65 mph. I would think the 3/4 tons would be close to the same. I am very happy with this truck and think the mpg is pretty good. Hope this helps some who are thinking of getting a gas tow vehicle.

[goducks10]

FishOnOne wrote:

goducks10 wrote:
I thought running premium in my 6.4 would allow it to keep up with diesels. I haven't had a chance to try that though.

Let me know when your ready! :W

LOL, Since we're around 2,000 miles apart I'm going to concede and give you the win.

[ExxWhy]

Thanks. For some reason I thought they recommended premium, upon further review I was mistaken.

In the research stage of a new truck, all options on the table so far.

[FishOnOne]

goducks10 wrote:
I thought running premium in my 6.4 would allow it to keep up with diesels. I haven't had a chance to try that though.

Let me know when your ready! :W

[goducks10]

I thought running premium in my 6.4 would allow it to keep up with diesels. I haven't had a chance to try that though.

[kellertx5er]

Premium fuel does NOT improve fuel economy for vehicles that do not normally require it.

[Community Alumni]

I'm running straight 87 in mine even when towing. I ran 89 while towing in the 100° heat and I didn't find a difference in pulling power. All the power was still there. But then again, I'm not all that heavy. Maybe if I was near max and towing in the heat then I would see a difference.

Empty I'm getting around 17 MPG on straight highway tanks. Mixed driving I normally end up somewhere around 15.6 MPG. Towing is typical and somewhere in the 9's for me. Best I've done was 10.3 and the worst was 6.5.

[Wills6_4_Hemi]

My truck has never seen premium fuel, guess it doesn't know what it's missing it has run/towed perfectly lol. regular only.

[ib516]

ExxWhy wrote:
Do you guys run premium fuel when towing? Or all the time?

I always ran 87. I did try 89 but couldn't see any mpg difference, and couldn't feel any performance difference even when towing.

If I were to tow in really hot weather, I might run 89 but never needed to.

[Wills6_4_Hemi]

ExxWhy wrote:
Do you guys run premium fuel when towing? Or all the time?

the Manuel recomends mid grade but goes on to say 87 octane is fine. With 25k miles I have always run 87.

[jerem0621]

Thank you Will!

[ExxWhy]

Do you guys run premium fuel when towing? Or all the time?

[Wills6_4_Hemi]

jerem0621 wrote:
Thank you for the feedback! The 6.4 is on my list for my next truck. I prefer a dually for towing too.

What kind of empty MPG could I expect with the 6.4 Hemi and the DRW?

My V10 F350 CC Dually got about 9.5 empty. Just to add perspective.

Thanks!

Jeremiah

I have got 16 on the highway but average 14.5 all around with 3:73 gears.

[jerem0621]

Thank you for the feedback! The 6.4 is on my list for my next truck. I prefer a dually for towing too.

What kind of empty MPG could I expect with the 6.4 Hemi and the DRW?

My V10 F350 CC Dually got about 9.5 empty. Just to add perspective.

Thanks!

Jeremiah

[Community Alumni]

They're pretty rare. I ordered mine because I knew they were hard to find and I wanted built a certain way. It only took about 6 weeks to get to me which isn't bad.