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hemi 1500 vs 2500 gas mileage

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Old 07-12-2009, 01:48 PM
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Default hemi 1500 vs 2500 gas mileage

pretty simple anybody know how close is the mileage between a hemi 1500 and a 2500
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Old 07-12-2009, 02:30 PM
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The hemi in a 2500 is underpowered IMO...get a CTD if you can. If you're looking at a QC 4x4 2500 hemi your mileage will be crap...if mpg even enters your mind with that truck you need a CTD or something else all together.
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Old 07-12-2009, 03:14 PM
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get a 2500 CTD 4x4 and get a "smart" programmer/tuner and u can get 450hp and 850tq easy!!! and still get 17mpg city and 21 mpg highway... this will be my next truck...and the powertrian will last 300,000miles easy!
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Old 07-12-2009, 03:35 PM
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yeah but another thing to look at is the maintenance on a CTD if you dont tow up to capacity regularly its going to be a waste of money IMO i get 14 city and 16 hwy, plenty powerful but of course i want more...and a tuner will destroy a diesel without accompanying bolt ons, (intake, exhaust, downpipe)
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Old 07-12-2009, 06:44 PM
Lifted4x4Astro Lifted4x4Astro is offline
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I get between 10 and 11 mpg empty around town. 12 highway if I baby her and between 7 and 8.5 towing our camper depending on speed. Don't get a 2500 for mileage. Get ****box econo car for that! You get a 2500 for towing, hauling and lifting/wheeling.
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Old 07-13-2009, 01:15 AM
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i get 13 city and 17 hwy. and thats driving like i stole it. plenty of power for me.
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Old 07-13-2009, 08:17 AM
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Bigc: hes defintatly right go with a cummins, our last cummins made it to 350,000miles without a problem and finally started to see the dealer closer to around 400k. the SMARTY from MADS is an excellent product and by far the best product tuner wise for the cummins.

draco, not sure what you mean about a tuner destroying a diesel without bolt-ons, if your talking about the 48RE thats one thing but not others....

so basically along with what everyone else has said, if your going to get a 2500 be sure to do yourself a favor and get a CTD, the hemi is fine and the owners of the 2500 HEMI love them, but i would personally grab a CTD if your worried about MPGs.
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Old 07-13-2009, 08:23 AM
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I had an '08 1500 QC 4x4 before trading it for a 2500 with essentially the same specs (long story). Slightly different tire sizes but a different axle ratio worked out to the same final drive.

Mileage dropped ~1Mpg according to the overhead for all driving; in town, highway, and towing, but.... I watch mileage for the amusement. It's a truck, and I don't stress over how much gas I put in it.

I get about 10Mpg towing a 7,000lb trailer and that's through coastal mountains in the northwest. My older trucks (73 Chev, 76, Dodge) got 10-12Mpg on the freeway so I'm really happy. My 87 suburban only got about 14-15Mpg on the freeway and I get about 18 now. My 2000 Explorer got about 19Mpg on the freeway.

As far as power... I can maintain 55-60Mph in the mountains. I think it was Hammer that said, essentially, to not worry about running the Hemi in its power band. 4000-4400RPM sounds a bit scary but the truck moves right along.
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Old 07-13-2009, 09:55 AM
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I love my 2500. The Hemi is plenty powerful in my opinion, but I do not have the need for a CTD. The mileage is averaging around 12.5. Plus I like being able to work on it myself. Draco, what size tires do you have? Is yours lifted at all?
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Old 07-19-2009, 09:16 PM
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Get a 2500 hemi with the six speed and you will get way better MPG than the MDS hemi, the CTD are a total waste of money if your not going to tow, CTD owners throw thier money out thier tial pipes with all the go fast mods, I still meet them at the red lights!!!

I get the same mpg as a CTD 6sp with my hemi 6sp, granted, I don't have the power, or mileage when towing, but I'm ok with that.

True dual ex, cab high topper, I can average 20 MPG high way, 6th gear 1800 RPMs, 60 mph, 65 mph, mileage drops big time...
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Old 07-19-2009, 11:48 PM
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There will be no difference between a 1500 and a 2500 really. What will affect gas mileage is your rear end gearing, and over all what configuration the truck is. 4door vs 2 door ect.
I dont get why people think just because it is a 1500 that its better on gas. Still the same engine. My 04 2500 hemi will actually get better gas mileage then my cousins 05 1500 4.7.

Aaron
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Old 07-20-2009, 08:40 AM
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Quote:
Originally Posted by ToyBoy View Post
There will be no difference between a 1500 and a 2500 really. What will affect gas mileage is your rear end gearing, and over all what configuration the truck is. 4door vs 2 door ect.
Love it or hate it; the 1500 has MDS and the 2500 doesn't.
2500 is about 500lbs heavier and is higher.

Gas mileage (for me) is close (1-2Mpg different) but not the same.
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Old 07-20-2009, 09:30 AM
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my 04 QCSB 4X2 Hemi gets 13-15 in town and 18-21out on the highway, it just depends on what ya need it for, and if ya really need the extra capacity of a 3/4 ton truck, if not stay with the 1/2 ton, with that said i love the 2500 and would doubt i would go back to a 1500, thats all from the peanut gallery, Brian Lee
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Old 07-20-2009, 12:20 PM
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I forgot about the MDS stuff, but like i said configuration will affect the gas mileage and rear end will the most. I can almost pull 19 mpg with my 04 2500.
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Old 07-20-2009, 06:11 PM
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i get 11.8 to 12 mpg while towing a 9000lb horse trailer through coastal hills.
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Old 07-20-2009, 07:30 PM
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Quote:
Originally Posted by ToyBoy View Post
There will be no difference between a 1500 and a 2500 really. What will affect gas mileage is your rear end gearing, and over all what configuration the truck is. 4door vs 2 door ect.
I dont get why people think just because it is a 1500 that its better on gas. Still the same engine. My 04 2500 hemi will actually get better gas mileage then my cousins 05 1500 4.7.

Aaron
Quote:
Originally Posted by ToyBoy View Post
I forgot about the MDS stuff, but like i said configuration will affect the gas mileage and rear end will the most. I can almost pull 19 mpg with my 04 2500.
That's weird that you ignore the weight difference between a 1500 and 2500 (heavier frame, rear, solid front-end ,etc) but you bring up truck configuration...for the weight i'm guessing. You can't have both man...you either have to acknowledge weight matters when it comes to mpg/speed or it doesn't.

Yes it's still the same engine but more engine load is required to get all that mass moving and maintaining speed. Gearing does help like you said but only so much....the higher rpms on the highway will hurt MPG.
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Old 07-22-2009, 03:50 AM
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I just took a trip out to Austin Texas this weekend and averaged a whopping 13.5 mpg running 75-80 on I-10. Granted mine is a 1500 megacab 4x4, but you get the idea. I wouldn't buy a 2500 with a hemi if your even modestly concerned with fuel mileage. In addition the cruise has a heck of a time maintaining 75 mph even on the smallish hills west of tallahassee. The truck would lose about 4-5 miles per hour before it decides to drop down 2 gears and then it goes like hell back up to 75. Makes for an entertaining ride in hilly country. I have to agree with the others who said a Hemi is a bit under powered in a 4x4 2500 (which is basically what a 1500 mega cab is).
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Old 07-22-2009, 05:34 PM
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Quote:
Originally Posted by swgachuck View Post
The truck would lose about 4-5 miles per hour before it decides to drop down 2 gears and then it goes like hell back up to 75. Makes for an entertaining ride in hilly country. I have to agree with the others who said a Hemi is a bit under powered in a 4x4 2500 (which is basically what a 1500 mega cab is).
Did you hint to the truck that you were in hilly conditions by using tow/haul? Cruise control can't anticipate hills, it can only respond to them. By the time it responds, you have already lost your speed.
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Old 07-22-2009, 09:22 PM
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I tried it once but it seemed like it wanted to stay in 4th gear all the time with the converter unlocked...I was thinking it would make the mileage even worse as the fuel mileage readout dropped 3-4 tenths over 20 miles. But, it did keep it from dropping all the way down to third gear and about 3500 rpm when it wasn't in tow/haul mode. Maybe they should have called it the tow/haul/hilly button.

Last edited by swgachuck; 07-22-2009 at 09:27 PM.. Reason: I can spell...kinda
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Old 07-23-2009, 01:10 AM
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Quote:
Originally Posted by swgachuck View Post
I tried it once but it seemed like it wanted to stay in 4th gear all the time with the converter unlocked...I was thinking it would make the mileage even worse as the fuel mileage readout dropped 3-4 tenths over 20 miles. But, it did keep it from dropping all the way down to third gear and about 3500 rpm when it wasn't in tow/haul mode. Maybe they should have called it the tow/haul/hilly button.
- repeating from other threads / speaking from experience - I've pulled 7,000lbs of trailer plus payload on long, steep grades in 2nd gear running over 4,000 RPM to keep 55-60MPH and my trans temperature tops out about 190F. The engine lets you know it's pushing some power, but coolant temp, trans temp, and oil pressure all stayed happy. I don't know if the 545RFE will lockup in 2nd, but I'd expect that even if it wasn't, I'm so far beyond stall speed that it's effectively locked. If not, I don't think my trans temp would have stayed under control (can anybody answer the lockup question?).

FWIW, O/D is specifically for flat/cruising and fuel economy. Every owner's manual I've seen says to not use it in hilly conditions or under load. "If the truck seems like it's straining, or can't keep speed, you need to take it out of O/D". Also, you weren't dropping mileage because of not using O/D, but because you needed more power for the hills. Not being a smart-alec, but the relationship and effects of load, RPM, speed. gearing and power-band are not always obvious. Your mileage would have dropped more if you let the engine continue to struggle rather than letting it produce the power it needed.

Last edited by Rojhan; 07-23-2009 at 01:26 AM..
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Old 07-23-2009, 01:10 AM
 
 
 
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