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3 Untruths about the Efficiency of Diesel Fuel

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Author: Rickey Pearce

When it comes to diesel fuel efficiency, there are a number of opinions. As with anything else, people have their preferences and experiences both with diesel and gasoline engines. Myths abound when it comes to buying and owning a vehicle powered by diesel fuel, and while many of these myths may have been true once upon a time, energy efficiency and new innovation have changed the way most diesel engines operate.

1. Diesel Fuel Efficiency vs. Expenses

Myth: The thought now is that it is too expensive to own a vehicle powered by diesel. Diesel fuel used to be cheaper than gasoline, but that has changed over the years. Additionally, a diesel vehicle costs more at initial purchase, making it seem like a more expensive option overall.

Fact: While the price of diesel has in fact gone up, the efficiency still remains the best in most situations. If you are the type of person who puts at least 100,000 miles on a vehicle before selling or upgrading, the initial costs of purchasing and operating a diesel car or truck will be offset by better mpg, higher Blue Book value and more often than not, fewer mechanical repairs.

2. Cleaning Diesel Fuel

Myth: It is still believed by some that diesel fuel can clog up fuel injectors or build carbon deposits on the cylinders. For this reason, it is sometimes suggested to add alcohol or mix a gallon of regular gasoline with a full tank of diesel.

Fact: Once upon a time it may have been true that diesel fuel could cause problems for engines, it is no longer the case. Clean diesel fuel has been innovated to perform much more efficiently without the added problems. Adding gasoline or other substances for the purpose of 'flushing' fuel injectors or cylinders can actually do more harm than good. Gasoline will actually destroy the lubricity of diesel fuel. This can lead to corrosion and other damage to the nozzles and fuel injection pump.

3. Smoke, Smog, Fumes and Noise

Myth: People unfamiliar with the concept of diesel fuel efficiency and even some who have owned a diesel in the past may associate the running of this type of vehicle with an unavoidable puff of black smoke, fumes and a noisy engine. The larger truck versions such as semis or towing vehicles are prone to a lot of noise whiles idling. They will also generate a lot of smoke and smog while accelerating.

Fact: With the changes in technology, concern for the environment and implementation of diesel engines in passenger cars and trucks, this myth no longer holds completely true. Currently, you are able to buy a car or truck that runs on diesel and does not produce as many harmful effects such as pollution and fumes. Diesel engines have become much quieter to operate and they produce less carbon dioxide than a conventional car. Like gasoline, diesel fuel does produce other harmful pollutants that are less visible.

About the author: Rickey Pearce has a love for automobiles. From the classic '57 Chevy to the fuel-efficient and hybrids of today, if it runs on 4 wheels, he is a fan. While in the market for his latest purchase, he went to for their new car buying guide. As one of the most trusted names in the industry, CarsDirect offers a large selection of new and used cars.

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