Frequent question: What engines require def?

Diesel Exhaust Fluid (DEF) is an emissions control liquid required by modern diesel engines. It is injected into the exhaust stream. DEF is never added to diesel fuel. It is a non-hazardous solution of 32.5% urea in 67.5% de-ionized water.

Do all diesel engines require 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. Truck stops often have a DEF pump right on the fuel island.

What vehicles use def fluid?

DEF is sprayed into the exhaust stream of diesel vehicles to break down dangerous NOx emissions into harmless nitrogen and water. This system is called Selective Catalytic Reduction (SCR) and can be found on 2010 and later model year trucks and many diesel pickups and SUVs.

Is Def bad for diesel engines?

In short, DEF is not to be mixed with diesel fuel. You definitely don’t want to accidentally put DEF in your diesel tank. Cleaning the fuel system after this mistake is costly. … In fact, many fluids in your truck (like diesel fuel, engine oil, wiper fluid, brake fluid and more) are much higher in their toxicity level.

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Is all DEF fluid the same?

DEF fluids all must meet an international standard and standards from the EPA that measure the purity of this fluid. Only purchase a DEF that meets the ISO 22241 standard. Sometimes, inexpensive bottles of fluid may claim to be DEF-compatible. However, if they don’t also meet the ISO 22241 standard, they are not DEF.

Can you pee in your DEF tank?

But sadly, the answer is “no”. A modern clean diesel car will recognize that your pee is not the right stuff. AdBlue solution has a far higher concentration of urea–32.5%–mixed into deionized water.24 мая 2011 г.

Can you drive without def?

Drivers need to be vigilant when it comes to DEF, so that they don’t lose time, damage their vehicles, and end up in big trouble with their employer. Ignoring the DEF light is never a good idea, so if it comes on, the driver should pull over and have their DEF refilled immediately.

Is it illegal to remove the DEF system?

In the U.S., the EPA Clean Air Act prohibits anyone from tampering with an emission control device on a motor vehicle by removing it or making it inoperable. Canada has essentially the same law under a different name, the Canadian Environmental Protection Act. DEF tampering is illegal, yet it happens.

Can I use water as DEF fluid?

For the O/O’s using DEF, you can use distilled water instead. No, you’re not supposed to- but 2.5 gallons of distilled water at Wally-World is cheaper than DEF in a truckstop and your tank won’t know the difference. … Inside the exhaust pipe, the DEF vaporizes and decomposes into ammonia and carbon dioxide.

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How long does 5 gallons of DEF last?

According to the owner’s manual, a full DEF tank should last 6300 miles, but, as everyone knows by now, your mileage will vary.

Why Def is bad?

If the engine is started for even a short time diesel fuel will ruin the SCR catalyst which is very costly to replace and will be out of warranty. If DEF enters the fuel system and spread throughout the engine it will ruin the diesel engine eventually.

What happens if you accidentally put DEF in diesel tank?

If DEF is accidentally put into the fuel tank, you MUST call for service immediately! Do NOT start the engine. The truck should be looked at immediately by a certified mechanic if you believe DEF has been added to the fuel tank. Starting the engine could result in MAJOR repair costs.

What happens if you put diesel in a DEF tank?

If you put diesel into a DEF tank, diesel is less dense than DEF so that it will float on the DEF. … If the DEF is introduced to a diesel storage tank, the DEF will, if not removed, cause damage to the fuel system. DEF is corrosive and harmful to many metals.1 мая 2017 г.

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.

How many miles will def last?

Most DEF tanks require one gallon of DEF for every 50 gallons of diesel fuel, and one gallon will generally last between 300 to 500 miles. It is important not to allow the DEF tote to become completely empty. It should be refilled when 2-3 inches of DEF remains in the tote.

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Is there a substitute for DEF fluid?

DEF is urea or otherwise known as aqueous ammonia. Windshield washer fluid that contains ammonia will do in a pinch. It contains less AA than needed but will get you to a town where you can get DEF.

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