Diesel Fuel Products

Reduce Costs & Maximize Reliability with Diesel Fuel Products and Additives

AMSOIL Diesel Fuel Products can help to eliminate expensive repairs.

Motorists favor diesels for their towing capacity, fuel efficiency and excellent durability. But cost of ownership and cold weather can pose challenges. As performance concentrates, AMSOIL diesel fuel products help reduce overall costs and combat the negative effects of both hot and cold temperatures .

Cost of Ownership

Whether gasoline or diesel, vehicles can be expensive to own. One costly problem associated with diesels that has become more common recently is diesel injector deposits, particularly in newer high-pressure common-rail (HPCR) engines. Deposits reduce engine power and efficiency and, if left untreated, can require injector replacements that can range from $5,000 to $10,000, depending on the vehicle and the number of injectors.

Some diesel owners believe injector replacements are simply a necessary cost of ownership. But accepting injector replacement as necessary maintenance comes with a host of unknowns, such as when the injector will fail, loss of power and fuel economy, tow-truck bills, additional engine damage due to a failing injector and more. A second, less-expensive option is protecting injectors through continuous use of AMSOIL Diesel Injector Clean (ADF) or Diesel Injector Clean + Cold Flow (DFC), just two of the diesel fuel products available from AMSOIL, which help eliminate expensive repairs at a much more reasonable cost. A comparison illustrates the savings available.

The cost to replace the injectors in a Chevrolet 6.6L Duramax can add up to approximately $7,000, not to mention the other risks of injector failures, like being stranded on the side of the road and paying for a tow truck. Using AMSOIL Diesel Injector Clean or Diesel Injector Clean + Cold Flow and following the maintenance dosage instructions is far less costly. Both diesel fuel products clean dirty injectors and add lubricity to help reduce fuel-pump and injector wear, helping injectors maintain efficiency and last longer. The peace-of-mind of being protected against being stranded on the side of the road and having to pay an expensive tow bill only adds to the value of routinely using AMSOIL Diesel Injector Clean or Diesel Injector Clean + Cold Flow diesel fuel products.


Diesel fuel suffers from the effects of cold weather. Diesel naturally contains wax. Many states have adopted regulations to require biodiesel, which contains even higher wax content. In cold temperatures, wax can crystallize and turn into gel, which can plug fuel lines, fuel filters, fuel pumps and injectors, shutting down an engine or preventing it from starting altogether.

For much of the year, refineries produce what’s known as #2 diesel fuel, which flows readily at temperatures above 40ºF. For use in cold weather, refineries produce a winter-grade diesel fuel known as #1 diesel. It provides increased cold-flow properties, but is more costly to manufacture and has reduced energy density compared to #2 diesel. As a result, diesel owners end up paying more through higher fuel costs and reduced fuel economy. Many refineries have changed fuel manufacturing strategies and now blend together #1 and #2 diesel, depending on the temperature. They normally call this their winter blend or a polar diesel.

Diesel Fuel Products fill a need

If the refinery blends and distributes a large batch of fuel with specific cold-weather properties, however, a sudden drop in temperature can reduce the fuel effectiveness in cold weather, increasing the risk of gelling. Diesel owners must add additional fuel additives or risk their equipment not starting or stranding them on the side of the road. AMSOIL Diesel Injector Clean + Cold Flow and AMSOIL Diesel Cold Flow (ACF) combat cold-weather performance issues and variations in diesel fuel quality. They modify the cloud point – the point at which waxes form – to help prevent fuel from gelling. They also help control ice formation by dispersing water in the fuel, helping keep fuel flowing to the engine. AMSOIL Diesel Injector Clean + Cold Flow and AMSOIL Diesel Cold Flow help protect equipment by keeping it running through cold winter months.

AMSOIL Diesel Fuel Additives Best Choice for Increased Fuel Lubricity

Adequate diesel fuel lubricity is essential for protecting the highly engineered components in modern diesel engines, particularly high-pressure common-rail (HPCR) engines, which are subject to increased wear and deposits that interfere with an optimum spray pattern, reducing power and fuel economy. Many diesel owners add two-stroke oil to their fuel for added lubricity. AMSOIL delivers a better solution that provides additional benefits.

ULSD Provides Less Lubricity
Diesel fuel has traditionally had high lubrication properties, but the desulfurization process that allows fuel to meet modern ultra-low-sulfur diesel (ULSD) requirements also strips it of compounds responsible for lubrication.

Due to government mandates for reduced emissions, nearly all diesel fuel sold in North America is ULSD, which contains a maximum of just 15 ppm sulfur, compared to traditional diesel fuel that contained up to 5,000 ppm prior to EPA regulations taking effect in 2006. ULSD is also compatible with modern exhaust treatment devices, such as diesel particulate filters (DPF), that also help reduce emissions.

The Two-Stroke Oil Remedy
Because lost fuel lubricity and the expenses associated with fuel-pump and injector replacements are serious concerns among diesel enthusiasts, some have adopted the practice of adding a little two-stroke oil to the fuel to replenish the lost lubricating properties. While this is generally a safe practice, it’s not recommended. Because all two-stroke oils are different, it’s a guessing game regarding how much oil is required to achieve a lubricity benefit. Using too little may not provide any benefit, while using too much may violate EPA laws regarding ash content.

The Superior Remedy: AMSOIL Diesel Fuel Additives
The best way to increase fuel lubricity is to use a fuel additive designed specifically for this purpose, like AMSOIL Diesel Injector Clean, Diesel All-In-One or Diesel Injector Clean + Cetane Boost. These additives also provide specific additional benefits designed to keep diesel engines operating at top performance.

Just one example
Ray McClelland, owner of Full Throttle Kustomz performance shop, in New Castle, Pa., compares adding more power to his turbodiesel truck to building a house – he started with a foundation and worked his way up. The mortar that binds the foundation is AMSOIL synthetic lubricants. “I’ve always run AMSOIL fluids since the day I bought it,” McClelland said. “AMSOIL is a proven product.” Check out the video for details.