DEF is denser than diesel fuel and will settle to the bottom of the fuel tank. DEF will rust the tank, further contaminating the system. A diesel engine relies on precise amounts of fuel injected into the combustion chamber.
Is DEF fuel the same as diesel?
DEF is never added to diesel fuel. It is a non-hazardous solution of 32.5% urea in 67.5% de-ionized water. DEF is clear and colorless, and looks exactly like water. It has a slight smell of ammonia, similar to some home cleaning agents.
What is the difference between DEF and diesel?
What is DEF? Diesel Exhaust Fluid (DEF) is a solution of urea and water that's injected into the exhaust stream of diesel vehicles to turn NOx gases (harmful emissions) into nitrogen and water.
Will DEF separate from diesel fuel?
Mixing DEF and diesel is never a good idea. Despite the fact that diesel fuel is separated from DEF by safeguards, it still happens: DEF is accidentally mixed with diesel fuel. This can lead to significant damage and costly repairs if it occurs frequently.
Is DEF heavier than water?
Diesel exhaust fluid (DEF) consists of 32.5 percent high-purity synthetic urea and 67.5 percent deionized water. DEF is slightly heavier than water at 9.08 lbs. per gallon (versus 8.34). Despite marketing names such as AdBlue and Blue DEF, it's a clear liquid with a slight smell of ammonia.
25 related questions foundWhat happens if DEF is put in fuel tank?
What happens if DEF is put into the fuel tank? Typically, if DEF is introduced to the fuel tank, the truck will run poorly or even fail to start. Repairs to the fuel system can be costly. Components that have been contaminated with DEF will show crystallization after drying for a few hours as seen in Photo 1.
Can you fill DEF while engine is running?
No, simply run the tank as empty as possible before refilling. Diesel Exhaust Fluid (DEF) is a pure chemical, so your bulk storage tank does not need to be cleaned out unless it is contaminated.
Can I put water in my DEF tank?
The DEF will be diluted by the added water, but depending on the ratio of water to DEF, the solution may still contain enough urea to deal with the NOX via an increase in the injection rate.
Will DEF freeze in my truck?
Diesel Exhaust Fluid or DEF Fluid
Whether in storage tanks or in equipment, DEF can freeze and possibly cause issues. As temperatures drop below 12°F, DEF will begin to solidify and not work as intended.
Does DEF ruin engine?
If DEF enters the fuel system and spread throughout the engine it will ruin the diesel engine eventually. The fuel system lines are not compatible with DEF and slowly corrode and over time.
Do all diesels use DEF?
A: Because almost all diesel-powered passenger cars and trucks built since 2010 are equipped with Selective Catalytic Reduction (SCR) and require Diesel Exhaust Fluid (DEF), it is readily available at most fueling stations and automotive parts retail stores.
Is DEF fluid all the same?
All DEF is the same product and the same 32.5% synthetic urea and 67.5% demin water. Some resellers add a blue dye to it but that serves no real purpose. There are about 3 or 4 companies that manufacture DEF and sell it to packaging companies or end users in bulk.
Can you mix different brands of Def fluid?
Registered. I've mixed different brand of DEF and never had an issue. Just make sure it meets the required specs.
Is DEF AdBlue?
WHAT IS DIESEL EXHAUST FLUID/AdBlue. Diesel Exhaust Fluid (DEF) also known as AdBlue®, is a non-toxic, colourless, odourless and non-flammable fluid. Stored in a dedicated tank in your car, it is injected into the exhaust system to clean exhaust gases.
What is blue DEF fluid used for?
BlueDEF® Diesel Exhaust Fluid is a mixture of high purity synthetic urea and deionized water that is used in Selective Catalytic Reduction (SCR) systems in diesel vehicles. DEF is used to help convert NOx to harmless nitrogen and water.
Is DEF made from pig urine?
Urea is an organic compound produced when a body metabolizes protein. (And yes, we expel it as urine.) But despite DEF earning the nickname “pig urine,” Diesel Exhaust Fluid is actually made of commercial-grade urea—synthetic ammonia and carbon.
Is it better to keep your DEF tank full?
Because it's 2/3 water, it begins to turn slushy at 12 degrees Fahrenheit and will freeze solid. One thing to keep in mind is DEF will expand when frozen, so it's best not to fill containers completely full to avoid damage to them. After it has been frozen, DEF can be thawed and used with no issues.
Does DEF go bad?
Like many petroleum products, DEF has a shelf life. DEF can usually be stored for a year without contamination.
Are DEF tanks heated?
All DEF systems require heating elements to prevent DEF fluid from freezing at temperatures less than 12 degrees Fahrenheit. DEF Heating Pots are designed to quickly return DEF to liquid form, ensuring proper flow through the lines and pump unit.
Can you use pee instead of DEF fluid?
The urea found in urine is not in the proper concentration needed for DEF, nor is it of a sufficient level of purity, in either urea or water. The bottom line, to spell it out just one more time… urine and DEF = Never. DON'T PEE IN YOUR DEF TANK!
What can I use instead of DEF fluid?
DEF is urea or otherwise known as aqueous ammonia. Windshield washer fluid that contains ammonia will do in a pinch.
How do you winterize a DEF fluid?
Push the DEF pump switch to "Trailer Fill". Allow the pump to run while squeezing the nozzle handle for 30 seconds. Unhook the quick coupler from the nozzle WHILE THE PUMP IS RUNNING. This will evacuate the DEF fluid from the nozzle.
How do I know when my DEF fluid is full?
When DEF runs out entirely, the light turns red, and the truck is electronically limited from going more than five mph. DEF levels can also be checked manually. The storage tank can typically be found next to the diesel fuel saddle tank on a truck, or in the spare tire area of a passenger vehicle.
How do I check my DEF level?
Checking the DEF Levels.
The storage tank is usually found either next to the diesel fuel tank on a truck, or near the area of the spare tire on a car. All vehicles with diesel engines meeting 2010 or later EPA guidelines have a dashboard warning system that alerts you when the DEF level is low.
How do you know when to add DEF fluid?
If the DEF tank contains less than 5% of its capacity, the equipment engine power will de-rate. Enough power will be available, however, to travel a short distance, so that you can add more fluid to the tank. The DEF tank needs to be filled once for every 3 to 4 times that you refuel with diesel fuel.
