Transportation Series.

When we are talking about transportation, we talking of whatever gets us where want to go. Be it trains, automobiles, buses, walking or bicycle. Depending from where you are from the main fuel for transportation is gasoline (petrol/gas) and diesel and we then have the electric car in the developed world. Saw one developed by Tesla Motors, great work there Elon Musk, please put in a word for me to Elon that I would like to drive one like that. Diesel is more common common around the world, slightly providing above 50% in most instances 54% in the US, 60% in Morocco and 69% in my country Zimbabwe. This is maybe as a result of the fact that Diesel is more efficient and cheaper than Gasoline.


Did you know that diesel has 12.1% more energy compared to gasoline? Yes that is true, gasoline has 34.7MJ/L or 125 000BTU/Gallon compared to diesel’s 38.6MJ/L or 139 000BTU/Gallon. Not only that, the diesel engine itself is a more efficient engine. It’s power stroke is managed differently than a gasoline engine, and it makes a more efficient engine. So, the fuel is more efficient, has more energy in it per gallon and the engine itself is more efficient. The energy content listed here is related to what is known as HHV, or higher heating value. There is a lower heating value (LLV). Don’t confuse the two; they often are in Web publications.

So as we celebrate Easter Holiday this year lets us be conscious of the oil consumption of our cars, miles per gallon or km per liter. You know, when you buy it, it’s got that sticker on it that says your EPA gas mileage is 36 m/g or 15.31km/l. And then, you get 22miles or 9.4km and go, what’s going on? Well, it’s how you drive it. The EPA sticker is just a guideline, not an exact measurement of how you’re going to drive it. Here are some tips that I found out:

  • Wind resistance increases dramatically with speed. That’s why aerodynamics have become so important in the last 15 years, and why all of our cars now look like jelly beans.
  • Getting into the highest gear you can, at the lowest possible speed, will save you plenty of gas. Why? Because you use less gas when the engine is turning slowly. The slower the engine turns, the fewer the number of explosions in the cylinders. And fewer explosions means less gas consumed. So, if you drive a manual transmission car, shift sooner. As long as the engine doesn’t buck, shudder, or ping, you’re fine. You’ll sacrifice the ability to accelerate quickly – but you can always downshift if you need to accelerate.
  • Why is it that everyone feels they have to accelerate going up a hill? It turns out that accelerating uphill is a fabulous way to burn up enormous amounts of gas. So unless necessary, don’t!



2 thoughts on “Transportation Series.

  1. DIESEL more efficient and cheaper than GASOLINE..point well taken. But which of the two bears more harm to the OZONE layer, that is after use? I fear a scenario where we get the most out of these these different fuels and on the other hand, negatively affecting the mother EARTH.. Mr Collins…

  2. Mr Marimbe, with a more efficient engine then we are looking at fewer emmisions because it will be approximating heat, carbon dioxide and water equation:
    The five main emissions for petrol and diesel cars are:

    Carbon Dioxide (CO2)

    Carbon Monoxide (CO)

    Nitrogen Oxides (NOx)



    Of these five, a diesel car is better than a petrol car with three of them, about the same with one, and worse with one. Only one of these classes of emissions is visible (particulates, or soot), and rather unfortunately for diesel cars, that is the one which is worse for them. The three emissions for which petrol cars are worse are invisible, so you won’t realize that they are there; however they still cause harm to health and the environment.

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