Does Fuel Quality Affect MPGs?

Discussion in 'Ask An Owner Operator' started by PE_T, Nov 18, 2018.

  1. adayrider

    adayrider Road Train Member

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    Kero is clear so not sure how anyone would know.
    25 gal to what? 150 tanks?
     
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  3. Midwest Trucker

    Midwest Trucker Road Train Member

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    I believe they are 120. I’m not totally sure on the amount to use but couldn’t hurt to top them off. 25 gal each is essentially a guess on what to use. Maybe someone else has experience with it?

    Thanks for the heads up on the clear.
     
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  4. Hammer166

    Hammer166 Crusty Information Officer

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    Don't use kerosene, it doesn't have the lubricity of #1. Or if you do make sure you add a lubricity additive. It wasn't as big a deal back in the day , the motors didn't need the lubricity to protect the injection system like they do nowadays
     
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  5. snowwy

    snowwy Road Train Member

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    Summer blend is usually bio. Around here anyways. I"m not sure on winter blend but it's not bio.

    Bio gels at 43 degrees.

    Around here. There are 4 tank farms. Locally. And J has their own.
    There are also bio plants.
    There are also places that buy their supply from New Mexico.

    So, not everyone gets from the same farm.

    And yes, quality can impact mileage. Not even the same location will provide the same mileage. What you get out of their tank one day won't be the same as the next day.

    My best mileage, came from NM. But also turned the engine light on.
    My best mileage otr. Came from a hick town. I don't know where they buy from but it wasn't in state.
     
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  6. PE_T

    PE_T Road Train Member

    DEF has a freezing point of about +14 F (if I remember correctly). The reason DEF does not freeze (normally) is because the tanks have warmers that are also capable of defreezing DEF in the tank. There is actually a pump that pulls DEF out of the lines and into the tank so DEF won’t freeze in the lines. It’s okay if DEF freezes inside the tank. The manual I read says that the warmers can liquify it “immediately.”

    People reporting frozen DEF probably have a bad DEF pump. One way to know if the pump is bad is by listening for suction noises on the passenger side shortly after shutting off the engine.

    By the way, I have never had DEF freeze on me, and I have been in temperatures as low as -25 F. I have, however, heard about frozen DEF at the pumps. Some truck stops have added insulation around the DEF pumps to prevent them from freezing.
     
  7. x1Heavy

    x1Heavy Road Train Member

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    I once bought 1.30 fuel in New Jersey, New Brunswick not far from 2.00 Petro actually. Caused a scene where two miles worth of trucks lined up hoping for 1.30 fuel. The poor dealer had emptied his 3000 gallon single tank of fuel, has to buy fuel at whatever whole sale price closer to 2.00 and cannot change the pricing outside his station until 24 hours have passed from the last pricing change. That one I think finally went to 2.00 but from what I understand of the whole episode his decision to sell at 1.30 cost him so much money. He must be really seriously bitter about it even today. I did feel sorry for him actually. And the truckers coming for the cheap fuel? It's like trying to hold back a ocean once word on the radio emptied two highways and everyone started flowing to that block.

    I guess the fuel ran ok in my tractor that week, it's definately a off label non branded fuel.
     
  8. MartinFromBC

    MartinFromBC Road Train Member

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    That is some heater to melt immediately 35 gallons of ice.
    It takes my stove on high a long time to melt a frozen pot of water with it being only a few gallons. Surprisingly I know, i read up a lot on DEF before buying those three trucks.
    And work on other people's trucks here in the shop that have DEF systems.
    Also seen my share of cardlocks with the DEF pump out of order in winter. My point was that nobody should take anything for granted be it their fuel, or DEF in the winter months where it gets cold. In year round warm climates no problem. The interior of BC is not friendly to things that freeze easily when winter comes. Sadly it seems the law makers of emissions regulations, and the designers of the systems themselves, likely didn't test their theories and products in places that were -25 or colder. But for those of us who live here, this is our reality for a few months every year, and this so called global warming I keep hearing about, hasn't happened yet.
     
  9. PE_T

    PE_T Road Train Member

    I was a bit surprised the manual says that it can liquify the DEF immediately. I was expecting it to say in a few minutes. Who knows how exactly that thing works. My DEF tank has a capacity of 23 gallons, and the older trucks I have driven had a smaller tank.
     
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