Regan Brown
Diesel fuel additives are a popular choice for improving the performance of diesel engines. They can help to improve ignition speed, act as a lubricant, improve fuel economy, and reduce emissions output. With so many options available, it can be challenging to determine which additive is the best for your needs. This introduction will explore the various types of diesel fuel treatments and their benefits, providing an overview of the key considerations for selecting an effective and suitable additive for your vehicle.
Diesel Fuel Treatment Characteristics
| Characteristics | Values |
|---|---|
| Purpose | Protecting and improving diesel engines |
| Additive Job | Raising the cetane number |
| Cetane Number | Indicator of combustion speed and necessary compression for ignition |
| Anti-Gel | Prevents fuel from turning into a gel in extreme cold conditions |
| Stabilizer | Prevents fuel from degrading and becoming unusable |
| Usage | 1 ounce of additive per 10 gallons of diesel |
| Price | $8 to $25 for a 1-quart bottle |
| Popular Additives | Opti-Lube XPD, Diesel Extreme, Yamalube 2R, Hot Shots LX4, K100D, Seafoam, Howes, Power Service, Stanadyne |
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What You'll Learn
Cetane rating and lubrication
Cetane is a chemical compound found naturally in diesel, and it ignites easily under pressure. The cetane number is the standard by which the quality of ignition of a diesel fuel is measured. This number is an indicator of the combustion speed for the fuel and the compression that is necessary for ignition. The higher the cetane number, the better the fuel quality, and the quicker the ignition.
Modern highway diesel engines tend to require fuel with a cetane number ranging from 45 to 55. Regular no. 2 diesel has a cetane number of 40 to 42, while Cenex Premium Diesel has a cetane number of 47 to 52. The diesel engines that power pickups and SUVs typically perform well with fuel that has a cetane rating of 48 to 50.
Fuel additives are used to raise the cetane number, which improves diesel's ignition speed and acts as a lubricant, protecting fuel system components like pumps and injectors. Cetane improvers are highly combustible chemical compounds designed to make fuels burn more quickly. However, these aftermarket products can be risky due to the difficulty in distinguishing between legitimate products and harmful ones.
A safer alternative is to use premium diesel with built-in cetane improvers, such as Cenex Roadmaster XL and Cenex Ruby Fieldmaster, which provide a quicker and more complete burn. Another option is to use a fuel stabilizer like Peak's Blue Agri-Clean, which boosts cetane by five points while improving injector performance, reducing emissions, and increasing fuel efficiency.
In addition to cetane gains and lubrication, a good diesel additive can offer other benefits such as improved fuel economy, reduced emissions, and protection against extreme cold conditions, where diesel can gel and restrict fuel flow.
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Anti-gel treatments
In cold weather, diesel fuel can transform into a waxy, glue-like gel, which can restrict fuel flow and cause severe engine damage. Anti-gel treatments prevent this by stopping the fuel from gelling and improving cold-weather operability.
One such treatment is Hot Shot's Secret Diesel Winter Anti-Gel, which uses three different chemicals: a wax modifier, a wax anti-settling agent, and a military-grade de-icer. The wax modifier reduces the temperature at which wax in diesel fuel solidifies, the wax anti-settling agent keeps the wax dispersed, and the de-icer disperses moisture, preventing it from clogging and freezing fuel filters in temperatures as low as -40 °F. This treatment is safe for use in all diesel engines, including marine, semi-truck, construction, agriculture, RV, and racing engines.
Another option is the Lucas Oil Anti-Gel Cold Weather Diesel Treatment, which has been recommended by users with Ford diesel engines. This treatment is also designed to improve engine performance in cold weather and protect against fuel gelling.
Opti-Lube XPD has been recommended by some users as a good anti-wear additive, although it is not specifically marketed as an anti-gel treatment.
For emergency situations where fuel or fuel filters have already frozen, Hot Shot's Secret also offers Diesel Winter Rescue, which provides the same protections as their Diesel Winter Anti-Gel but is intended for emergency use.
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$92.99
Fuel stabilizers
When choosing a fuel stabilizer, opt for one made with safe, quality ingredients that won't harm your engine. Avoid those that contain alcohol or harmful solvents. A good stabilizer will demulsify water, removing it from your fuel.
Some popular options for fuel stabilizers include STA-BIL, PRI, Star Brite, Sea Foam, and Howes Meaner Power Kleaner. Sea Foam, for example, can be used to clean, lubricate, and stabilize fuel, and it works with almost every type of liquid fuel, including diesel. It has an unlimited shelf life and is versatile enough to be kept in your vehicle for everyday use or emergencies.
Another option is Peak's Blue Agri-Clean, a fuel stabilizer for tractors and other extreme-duty vehicles. It boosts the fuel's cetane rating, improves injector performance, and increases efficiency while reducing emissions.
Diesel Extreme is also mentioned as a good additive for long-term internal diesel injector deposit removal and moisture accumulation caused by varying fuel quality.
Using a diesel fuel stabilizer is simple: add it to fresh fuel to allow for proper mixing, and you're set until you add more fuel. The general recommendation is to use 1 ounce of additive per 10 gallons of diesel.
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Injector cleaners
There are dozens of diesel injector cleaners on the market, but some have a better reputation than others. Some formulas are only compatible with certain makes and models, so it's important to check your owner's manual or the instructions on the bottle before adding it to your fuel tank.
One trusted brand known for making superior diesel care products is Bostech. Their high-mileage cleaner is designed specifically for engines past the 75,000-mile mark. The Lucas cleaner, another product by Bostech, is actually two products in one. It unclogs the injector system and lubricates the various mechanical components of the injector, including the injector head and the rail line. It also neutralizes the effects of low-sulfur fuel, which tends to be full of particulate matter.
Another dual-use injector cleaner is the Royal Purple bottle. It will break up clogs and lubricate the system for improved acceleration and increased horsepower. The manufacturer recommends using a little bit each time you fuel up instead of using a whole bottle after you've reached 3,000 miles.
Other injector cleaners that have been recommended by users include Opti-Lube XPD, Yamalube 2R, and Power Service Additive. Diesel Extreme is also mentioned as the best additive for long-term Internal Diesel Injector Deposit (IDID) removal and moisture accumulation caused by varying fuel quality.
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Biodiesel additives
Biodiesel is a renewable, clean-burning fuel that can be used in diesel engines. It is made from recycled cooking oils, vegetable oil, soybean oil, and animal fats. It can be used as a diesel fuel replacement, in combination with petrodiesel, or as a heating oil replacement. Biodiesel has strong lubricity and cetane ratings, and it produces lower emissions, making it an appealing option.
However, biodiesel can absorb water from the atmosphere, creating a breeding ground for bacteria and fungi. This can lead to issues within the injection system and engine. Therefore, biodiesel should be treated with quality additives. FPPF Biodiesel Fuel Power is a diesel fuel additive designed to absorb water in biodiesel, strengthen chemicals, and reduce the aging process. It also helps prevent the formation of sludge and deposits, and controls water to reduce the potential for bacteria and fungi growth.
Bio Kleen Diesel Fuel Biocide Treatment is another additive that acts as a dual-phased biocide to kill microbes, including bacteria and fungus, in diesel fuel systems. It removes water and slime, disperses contaminants, and stabilizes fuel during long-term storage.
Opti-Lube XPD is an anti-wear additive that has been shown to reduce wear and improve performance. Diesel Extreme is another popular additive that helps remove and prevent deposits and moisture, ensuring the proper functioning of fuel pumps and injectors.
In addition to improving ignition speed and acting as a lubricant, diesel additives can also help improve fuel economy and reduce emissions output. Anti-gel additives are also important in extreme cold conditions to prevent fuel from turning into a gel and restricting fuel flow.
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Frequently asked questions
A diesel fuel treatment is an additive that improves the performance of diesel engines. It can help to improve ignition speed, act as a lubricant, improve fuel economy, and reduce emissions output.
In cold weather, diesel can turn into a gel-like substance, so anti-gel treatments are important. Opti-Lube XPD is a good year-round treatment with cold-weather anti-gel properties. Hot Shots LX4 is also a good option, but it cannot withstand very cold temperatures.
There are a variety of diesel fuel treatments available, including:
- Peak's Blue Agri-Clean: A fuel stabilizer that boosts cetane, improves injector performance, and reduces emissions.
- Biodiesel: The best anti-wear additive in a test performed by a user on Reddit.
- Diesel Extreme: A treatment for long-term Internal Diesel Injector Deposit (IDID) removal and moisture accumulation.
- Seafoam: Cleans dirty fuel systems and injectors.
- Howes: A quality additive to maintain the fuel system.
- Power Service: A popular choice that can be used to condition the fuel and provide lubricity.
