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2008 cummins millage after break in?

Discussion in 'Ram Trucks' started by dakotasrock, Jan 1, 2008.

  1. dakotasrock

    dakotasrock Senior Member
    from MN
    Messages: 260

    has anyone broke in their 2008 cummins engine yet? If so what kinda millage you getting? I heard some friends saying the new 2008 engines are going to get less millage because of the new diesel standard, and that could be the difference between a 2007 and a 2008 for me when I decide to buy one. 2007's are stated to get over 20 on the highway!
     
  2. niederhauser la

    niederhauser la Member
    from Utah
    Messages: 79

    I only have 3000 miles on mine. I have got up to 19.5 mpg on the highway at 75 mph..thats the best I have got. I towed about 10000K on a 600 mile round trip and averaged about 11 mpg. The new 6.7 will not get as good as MPG as the 5.9 because of all the new emissions. I had the chance to get a 5.9 but I wanted the 6 spd auto and the exhaust brake, plus this new 6.7 has some amazing power and pulls like crazy. If you want to mod your new truck then go with the 5.9 because the aftermarket has not cought up with the 6.7. I think when the aftermarket catches up then the 6.7 will be even more amazing.
     
  3. sno commander

    sno commander PlowSite.com Addict
    from ct
    Messages: 1,061

    not to hijack your thread but, niederhauser la, how is plowing with the 6.7 any trouble with the dpf plugging up or anything from going back and forth at low speeds? how do you like the 6 speed?
     
  4. ProSeasons

    ProSeasons Senior Member
    Messages: 624

    ALL Cummins engines are capable of amazing power. And that engine won't be 'broke in' until well over 100,000 miles. It will need it's first rebuild in 300,000 miles and is capable of a lifespan of well over 1 million miles. The Dodge will be long gone, but the engine you can put into another project. However.......

    ...it being a diesel, and your'e seeking it's 'break in point', actually means you want to know when your rings will 'seat' into your cylinders.

    The answer is the first time you work it hard. I mean really hard. PowerStroke, Duramax and Cummins owners have a saying: Load it down, hook it to a trailer, find a mountain and drive it like you stole it.

    Seriously. The block will become heat soaked and the rings will form themselves to the cylinder and after it all cools, your compression will actually be better, making more power with less fuel and presto, more mpg.
     
  5. AiRhed

    AiRhed Senior Member
    Messages: 401

    A-Men to that!!! Don't forget to change the oil after you do it though!
     
  6. niederhauser la

    niederhauser la Member
    from Utah
    Messages: 79


    I have not had any problems with it. I have probably 40 hours of plow time and it plows great. The 6 speed auto is awesome! With the Engine brake towing is great. So far I love the truck but Im hoping the the MPG gets better over time
     
  7. TEX

    TEX Senior Member
    Messages: 606

    i havent heard of any 6.7 getting "good" mpg yet........
     
  8. cush

    cush Junior Member
    from Idaho
    Messages: 2

    I got the dpf 80% full last week when plowing. I just stuck it in 1st gear with the little selector button and it cleaned it self off in about 15mi. I think it was caused because i let it idle for about an hour while we got enough to plow. I have just over 11,000 miles and this is the first time i have had this happen.
     
  9. dakotasrock

    dakotasrock Senior Member
    from MN
    Messages: 260

    dpf ? whats that?
     
  10. cush

    cush Junior Member
    from Idaho
    Messages: 2

    It is basically a filter screen on the exhaust thant helps reduce emissions. After it gets so full it burns it out with extra fuel.
     
  11. TEX

    TEX Senior Member
    Messages: 606

    diesel particulate filter. ya it catches all the crap(smoke) then when full the engine raises EGTs (exhaust gas temp) to burn it off.