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Looking to buy my first Cummins Diesel, need some advice

Discussion in '6.7 Common Rail' started by Kroni, Jul 30, 2020.

  1. Kroni

    Kroni Junior Member

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    Hey all,

    I've never owner a diesel truck and I could use any help you guys are willing to give.

    I currently have a 2006 Dodge Ram 1500, quad cab, 5.7 hemi, tow package with 3:55 gears, 92K, original owner. She's been a great truck but she's struggling to pull my camper, which lightly loaded is 7100 pounds. She doing it, but its tough on the hills.

    I've been looking and have found a 2014 2500 6.7 Laramie mega cab with 49K for $45,000. It looks to be in very good condition. Only things I don't like is the plastic bed liner and no clearance lights (I'm a sucker for those lights haha!). Does that seem appropriately priced?

    Anyway, I'm looking for any advice or even opinions. I've been thinking about getting a 2500 with the 6.4 hemi but I don't want to be in the same place again if I get a heavier camper or load more into mine. I also want to be able to climb hills without having to be in the right lane with my hazards flashing.

    How are the new diesels with the DPF and DEF? Does the engine try to re-generate at inopportune times? Is the DEF a PITA? I will be buying from a dealer and will want an extended warranty so I won't be deleting anything anytime soon. Also, I will only be putting about 5000 miles a year on the truck. How bad is it for a diesel to sit for a month or so without driving? It will be kept in a garage. How much maintenance besides oil changes should I expect? Are they maintenance nightmares or relatively maintenance free? What kind of fuel mileage should I expect towing and not towing?

    I know these are a bunch of rookie questions... I apologize in advance. I'm just trying to be sure I'm making a good decision.

    Thanks
     
  2. mtnrider

    mtnrider Senior Member

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    That seems really high for a 2014 to me but prices are crazy right now.

    As far as DPF regens etc. it's transparent to the user so it's not like it interrupts anything. DEF usage is minimal so not a big deal.
    Oil and fuel filters are 15K mile intervals (or 6 months) but I go by the mileage myself. With the low miles you will be driving I would say just do it once a year.
    Don't let the anti-diesel people fill your head with paranoia, while any vehicle can have issues honestly they are few and far between.

    Mileage towing (depending on load) will be ~11-12? Not towing will depend on type of driving. Anywhere from 15-18 average would be a good estimate.


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  3. Fuel35 67

    Fuel35 67 Member

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    Diesels are for longevity, they just run forever provided fluids are changed according to your driving habits, such towing, in town driving and freeway.

    I bought my Grandfather’s 99’ from him about 7 years ago. It had 117k on it, I changed all the fluids and did have a vp44 take a dump at 135k. That was my first diesel, I then sold it to my cousin (keeping it in the family) so I could get my 11’ due to my son being uncomfortable in the back in the 99’.

    Bottom line, once you go diesel, it’ll be really hard to go back to gas.
     
  4. Sandevino

    Sandevino Senior Member

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    Diesel is a fantastic fuel so long as you will use it as intended. The issues crop up when people buy HD Diesel trucks and commute 30 miles a day and infrequently haul anything. Diesel is meant to work hard, run long and maintenance is key.

    There are additional costs (up-front and routine) with diesel - $9-10k more expensive than gas, DEF, fuel filters, fuel cost, 10-15 quart oil changes, etc... but you know this going into it. Again, this is a rounding error if you keep the truck 10+ years, but in the spirit of transparency we have to give you the honest truth.

    Resale - you will get on average $5 - 7k more for a diesel truck when you sell it, but that has everything to do with the higher purchase cost than the truck itself. All things considered, I wouldn't buy a used diesel as I know someone likely beat it to death then decided to sell it. Now, if it has a 6" lift, skinny dumb-shit tires and a set of truck nuts, I'd buy it, but not for what Keith Urban wanted.

    Be careful, as once you go Diesel, you never go back. I have a couple Peterbilt diesels and love them. For my personal travel, I went gas, but I have
     
  5. Kroni

    Kroni Junior Member

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    Thank you for your input. I've had a couple of old VW diesels a number of years ago and really liked diesel but the larger trucks and emission systems are new to me.

    I've feel confident that I will go with a diesel, I just might have to go to a lower trim level to get what I MUST have at a price I can afford. As much as I'd like to have leather seats and a sunroof, the diesel engine is far more important to me.

    As far as driving and maintenance, I agree, I'll probably do once a year oil changes. I do a bit of hauling each spring getting full pallets of mulch for my neighbors and myself but I'm thinking maybe I should drive it a bit more than my current truck to keep it "happy".

    Any other input will certainly be appreciated.

    Thanks
     
  6. Travelin Ram

    Travelin Ram Senior Member

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    Diesels don’t mind being parked. What will get you in trouble is repeated short drives. For instance I used to have a 7 mile commute; that’s barely far enough to warm the engine, and certainly not enough driving time to do a regen on a DPF.

    As long as you get some regular intervals of sustained high speed -even better high load- it’s fine.
     
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  7. Kroni

    Kroni Junior Member

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    Is there anything particular I should look out for when buying one? Any tell-tale signs I should be aware of?

    I assume at this point as long as the check engine light is not not I should probably be good to go, right?
     
  8. mtnrider

    mtnrider Senior Member

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    Yes, Stay away from any truck that has been deleted/tuned. 9 times out of 10 you will end up with someone else's problem truck that they dumped.

    Stick with 2014 or newer trucks, the older pre-DEF trucks got horrible mpg and require a little more maintenance with the EGR.

    Other then that just give it a good drive and make sure you don't have any vibrations or loose feeling in the steering.


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  9. Walter Conrad

    Walter Conrad Junior Member

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    Just my 2 cents, i think the seller price at 45k is way to high. So let me try to give you some background. Both the DW and myself hate leather seating surfaces in our vehicles, so we would not consider a RAM over an SLT or Bighorn. We do however like them fairly well optioned, plus we do haul a large 5th wheel, around 18000lb loaded.
    We just purchased a new 2020 Bighorn, CC, LB, DRW, 6.7 nicely equipped. MSRP was 63770, with all the current incentives in our region and wheeling and dealing we were able to get it down to 53000, which included spiffy RAM running boards and an Extang trifold tonneau cover plus we got an additional 17000 for our trade bringing it down to 36000.

    My story is that the deals on new are out there.

    As far as the DEF use ours came with 3/4 tank and we only have about 700 miles on it right and still showing 1/2 tank. According to the onboard computer we are getting 18mpg. We haven't had a chance to tow with it yet.

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  10. Kroni

    Kroni Junior Member

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    Walter,
    Thank you very much for your post, it helped a lot. However after looking for a used 2500 diesel and going to a few dealers, there just aren't any used diesel trucks that make sense for me. My camper can be loaded to a max weight of 9600, it usually around 7300. I am now leaning towards a new or possibly very lightly used 2019 2500 with the 6.4 hemi. I really didn't want to compromise and go to the gas engine, but its rated at 14,200 pounds towing. I'm thinking I don't need the 18,000 pounds of towing capacity that the diesel brings...
     
    Last edited: Aug 1, 2020

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