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Winterize fuel, high cetane

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  • Owner

The fuel I've been picking up finally went to winterized diesel and the cetane really jumped in the last few tanks. Found that you have to retard timing a wee bit to gain the edge again. A lot of people consider the air temp like I did too thinking cold air will take more timing to ignite the fuel. Actually the cetane has more weight that air temperature. Even though my morning run is at about +10°F my IAT is about 62°F. I tried advancing timing found the MPG dropped hard to 17.6 MPG. Now after retarding jumped back to 19.5 MPG.

 

This follows the same rules that the MPG of the Mopar1973Man High Idle. Just I'm programming a tune to take advantage optimal timing. Still the MPG switch helps for during your warm up mode till the Quadzilla goes into full run mode.

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  • BBHD
    BBHD

    I dropped my timing 2.5* a few weeks ago after noticing a drop in MPG's. 

  • notlimah
    notlimah

    Interesting. Looking forward to the results

  • AH64ID
    AH64ID

    I don't recall where I read it, but I did read that fuel that has the Cetane chemically altered doesn't have the BTU change, which does make sense.    I've also read that many places now jus

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Good point!! Plus I had a 600 round bale in the back for traction, so I know that hurt some as well. 

    • Haha 1
    5 hours ago, Unreal Summit said:

    Good point!! Plus I had a 600 round bale in the back for traction, so I know that hurt some as well. 

    We all need to drive around with one of them in the back in the winter time :lmao2:

    42 minutes ago, Dieselfuture said:

    We all need to drive around with one of them in the back in the winter time :lmao2:

     

    I had to do something so I didn't drive in 4x4 all the time. These thing suck in the snow! Especially with the long bed. But that round roll maybe a huge difference. 

    1 hour ago, Dieselfuture said:

    We all need to drive around with one of them in the back in the winter time :lmao2:

     

     

    I don’t notice much difference unless I have around 1K in the bed. 

     

    I need about a ton centered just aft of the rear axle to get to the ideal 50:50. 

    58 minutes ago, Unreal Summit said:

     

    I had to do something so I didn't drive in 4x4 all the time. These thing suck in the snow! Especially with the long bed. But that round roll maybe a huge difference. 

     

     

    Yeah, torque can be tricky. My throttle sensitivity is lower than stock for winter and dirt purposes. 

    It can be very trick. Lol gotta even out the weight a Little!

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    Welcome To Mopar1973Man.Com LLC

    We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features.  Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.