Katerina Swanson
Diesel fuel in Australia has two main options: regular diesel or premium diesel. While all diesel fuel in Australia meets or exceeds a Cetane rating of 46, there are different brands and types that may be better suited to different vehicles and conditions. For example, winter diesel is designed for extremely cold conditions, and truck diesel has different pump flow rates and nozzle sizes. Premium diesel has additives that may improve engine performance and cleanliness, but regular diesel is typically sufficient for everyday driving.
| Characteristics | Values |
|---|---|
| Cetane rating | All diesel fuel sold in Australia has a minimum Cetane rating of 46. Premium diesel has a typical Cetane Index of 52. |
| Sulphur content | All diesel fuel in Australia since 2009 is 'ultra-low sulphur', with 10 parts per million (PPM) sulphur content. |
| Lubricity | Ultra-low sulphur fuel has lower lubricity. |
| Biodiesel content | Australian regulations allow biodiesel to be added to standard diesel in up to 5% quantities by volume without additional labelling. |
| Additives | Premium diesel contains special detergents and additives that prevent foaming and keep the engine cleaner. |
| Price | Premium diesel costs a few cents more per litre than regular diesel. |
| Performance | Premium diesel offers small performance benefits for everyday driving. |
| Fuel distributors | BP, Shell, Mobil, Caltex, Ampol, and Woolworths. |
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Premium diesel
The use of premium diesel may be beneficial if you frequently drive in stop-start traffic or on short trips, as it can help reduce the problems associated with these driving conditions. Additionally, it is recommended to run a couple of tanks of premium diesel after a long trip or when filling up at remote service stations.
The price difference between premium and regular diesel is quite significant, and fuel companies create a perception that premium diesel is better, leading to higher charges. However, all diesel fuel sold in Australia must meet the same standards, including a low sulphur content of no more than 10 parts per million (PPM). The cetane rating, which measures how quickly and efficiently diesel burns, is also the same for both regular and premium diesel. As a result, there are no performance advantages to using premium diesel.
While premium diesel may not offer improved performance, some drivers choose to use it for its potential benefits in cleaning the fuel injection system and reducing foaming during filling. The decision to use premium diesel depends on individual preferences and driving conditions.
In summary, premium diesel in Australia is characterised by its additive package, which includes detergents and anti-foaming agents. While it may not enhance performance, it is believed to have beneficial effects on the fuel injection system and the refuelling process. The higher price of premium diesel is a consideration, and drivers should weigh the potential advantages against the cost difference when deciding whether to use it.
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Cetane ratings
Cetane is a measurement of a diesel fuel's ability to ignite as soon as possible, with faster being better in the case of diesel engines. It is a measurement of how quickly and completely diesel fuel burns, with higher cetane numbers indicating a more efficient and complete burn. All diesel fuel sold in Australia meets or exceeds a Cetane rating of 46, with higher Cetane ratings available through additives. The base used for all diesel in Australia is the same blend and will run the same, regardless of what vehicle you drive. The difference is in additive packages that are put into the fuel.
Diesel fuel can be improved with additives, and this is where the Cetane rating comes into play. The Cetane rating of diesel fuel can be increased by adding additives, which can improve the fuel's performance and efficiency. These additives can be purchased separately and added to the fuel tank, or they can be included in the fuel by the manufacturer. Some common additives include detergents, corrosion inhibitors, and anti-foaming agents. These additives can help to clean the fuel injection system, prevent corrosion, and improve the overall performance of the diesel engine.
Premium diesel fuels typically have higher Cetane ratings than regular diesel fuels due to the inclusion of these additives. They are designed to provide improved performance, efficiency, and engine protection. Regular diesel fuel, on the other hand, may have lower Cetane ratings and may not include the same level of additives. However, it is important to note that all diesel fuel sold in Australia must meet or exceed the minimum Cetane rating of 46, ensuring a certain level of quality and performance.
The Cetane rating of diesel fuel can also be important in cold climates. In extremely cold conditions, diesel fuel can partially freeze or gel, affecting its performance. In such cases, a higher Cetane rating can improve the fuel's ability to ignite and burn efficiently, even at lower temperatures. This is why special blends of diesel fuel with higher Cetane ratings may be sold in alpine regions or during winter months in colder climates.
While the Cetane rating is an important factor in diesel fuel quality, it is not the only consideration. Other factors that can affect diesel fuel quality include the amount and type of additives used, the sulphur content, and the lubricity of the fuel. Australian regulations allow for biodiesel to be added to standard diesel in small quantities, and the inclusion of biodiesel can affect the fuel's performance and emissions. Additionally, the Fuel Quality Standards Act 2000 sets out specific requirements for the quality of petrol and diesel sold in Australia, ensuring a minimum level of quality and safety.
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Winter diesel
While Australia's temperate climate means that winter diesel is rarely needed, it is still available in some parts of the country. Winter diesel is a special blend of diesel that is formulated to prevent waxing in cold, alpine regions. Waxing occurs when the natural waxes in diesel solidify due to cold temperatures, which can block fuel lines and filters, causing operational issues.
In Australia, the standard for diesel cloud point—the temperature at which wax in diesel begins to solidify—varies seasonally. During winter, diesel manufacturers are required to produce diesel with a lower cloud point. However, this may not be sufficient to prevent waxing in extremely cold areas. That's where winter diesel comes in.
Caltex Winter Diesel, for example, is specially formulated with an even lower cloud point than regular diesel. It is distributed to meet the demands of specific cold or alpine areas, and is dispensed through regular diesel or Vortex Premium diesel pumps in these regions. This means that if you're heading to a ski field, you can fill up with Caltex Winter Diesel at your final destination, ensuring your diesel engine will run smoothly in the cold conditions.
In addition to winter diesel, some service stations in cold areas may offer alpine diesel additives, which can be added to your fuel tank to prevent waxing in winter conditions. These additives are particularly important when driving in areas where temperatures regularly drop below minus seven degrees Celsius.
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Diesel Exhaust Fluid (DEF)
DEF is available for purchase at various locations, including gas stations, auto parts stores, supermarkets, and large home improvement stores. It is typically sold in 1-gallon jugs or 2.5-gallon containers, and some locations offer pumps specifically for DEF. As of 2013, many truck stops have added DEF pumps adjacent to fuel pumps for convenience. DEF is also available in bulk quantities for consumers who require larger amounts.
It is important to ensure that your diesel vehicle has enough DEF to function optimally. Most modern diesel vehicles will issue warnings when their DEF reservoirs run low, and it is recommended to refill them as soon as possible. Running out of DEF may cause the vehicle not to start or limit its speed until the reservoir is refilled.
One popular brand of DEF is Blue DEF, which meets the highest quality and safety standards. It is stable, colourless, odourless, and easy to use, with a collapsible pouring snake that makes refilling convenient. Blue DEF has received positive feedback from customers, who have reported good engine performance and no mechanical issues.
In summary, Diesel Exhaust Fluid (DEF) is an essential component for diesel-powered engines to reduce emissions and maintain optimal performance. It is widely available and easy to use, making it a convenient option for diesel vehicle owners to adhere to federal emissions standards.
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Diesel brands
In Australia, diesel fuel is derived from the same base source, meaning that the raw fuel you get at different stations initially starts out very similar. Once distributed to different fuel companies, they add their own mix of additives, which are meant to improve the fuel in various ways. These additives may help your car run better, but their effectiveness varies.
Some examples of diesel brands in Australia include Shell, BP, Mobil, Caltex, Woolworths, and Vortex Diesel (Caltex's premium diesel brand). Shell and BP are two popular choices among drivers, with BP guaranteeing the quality of its fuel at the bowser and Shell guaranteeing quality when it leaves the refinery. However, it is worth noting that all diesel fuel sold in Australia meets or exceeds a Cetane rating of 46, indicating that the base diesel blend will run the same regardless of the brand.
Premium diesel is an option that includes additives to prevent or reduce build-ups of contaminants in your fuel system. It typically costs a few cents more per litre than regular diesel and is recommended to be used at least every few months. While premium diesel may offer benefits for certain vehicles, regular diesel is sufficient for most drivers and is more budget-friendly.
Another type of diesel available in Australia is biodiesel, which can be added to standard diesel in up to 5% volume without additional labelling. Biodiesel is derived from vegetable oils, animal fats, or cooking oils rather than processed crude oils.
In summary, while there are different diesel brands and types available in Australia, the base fuel across these options remains similar due to strict government standards. The main differences lie in the additives used by each brand, which may or may not provide noticeable benefits to your vehicle's performance.
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Frequently asked questions
There is no definitive answer to this question as it depends on individual needs and vehicle requirements. However, some popular choices include BP, Shell, and Mobil.
Premium diesel contains additives that can help clean deposits from your fuel injection system and prevent foaming, making it easier to fill up your tank. It typically costs a few cents more per litre than regular diesel.
Premium diesel is not necessary for everyday driving, and regular diesel is typically sufficient. However, if your vehicle experiences issues due to lots of stop-start driving and short trips, premium diesel may help reduce these problems. Additionally, if you have an older diesel vehicle, using premium diesel occasionally may help clean your fuel system and improve performance.
Renewable diesel is a product that can take a wide variety of feedstocks. While it is available in other parts of the world, it has not gained popularity in Australia as of writing.
DEF, such as AdBlue, is a highly corrosive fluid used to reduce emissions in diesel vehicles. It should not be added to the fuel tank but is sprayed into the vehicle's exhaust system to convert oxides of nitrogen into harmless gas and water vapour.
