#1.BlueDEF DEF002 Diesel Exhaust Fluid
If you want the best diesel exhaust fluid, we highly recommend the BlueDEF DEF002. This brand gives you the cleanest emissions and works the most effectively according to our surveys and research. It is very clean and reliable and meets all of the ISO purity and composition standards. Also, it helps increase gas mileage as a nice bonus.
Best Diesel Exhaust Fluid
- #1.BlueDEF DEF002 Diesel Exhaust Fluid
- #2.Prestone HD1001 Command Diesel Exhaust Fluid
- #3.AD BLUE Diesel Emissions Fluid
- #4.ACDelco Diesel Exhaust Emissions Reduction
- #5.Genuine Ford Fluid Diesel Exhaust Fluid
#1.BlueDEF DEF002 Diesel Exhaust Fluid
We really like the BlueDEF DEF002 and think that it is the best diesel exhaust fluid on the market. It is made of a mixture of 32.5% high-purity synthetic urea and 67.5% deionized water. With this brand, we think that you will get the best increase in gas mileage, up to a 5% increase. It is very stable, odorless, colorless, and meets ISO standards for purity and composition.
Based on our surveys, this brand also produces some of the best emissions. It does a great job of converting nitrogen oxide into harmless nitrogen gas and water vapor for cleaner emissions. Finally, we just want to say that it is a non-toxic, non-flammable fluid that can be stored in your trunk with no problem. It is also pretty good value.
#2.Prestone HD1001 Command Diesel Exhaust Fluid
Next, we have the Prestone HD1001 Command Diesel Exhaust Fluid, which is the best diesel exhaust fluid for those who want an incredibly clean and reliable fluid for emissions control. It works with all SCR-equipped diesel engines and you need about a gallon of Prestone for every 50-75 gallons of fuel. It is also a very safe and easy-to-handle nontoxic solution so you can keep it in your vehicle.
In terms of composition, it is 67.5% water and 32.5% automotive-grade urea. Overall, it is very stable and has been thoroughly tested to meet all API and ISO 22241 requirements. If you end up crunching the numbers, you will find that it is pretty much the cheapest quality DEF fluid your money can buy. BlueDEF is definitely more premium, but you end up paying a bit more.
#3.AD BLUE Diesel Emissions Fluid
Another great choice when it comes to the best diesel exhaust fluid is the Ad Blue Diesel Emissions Fluid. This fluid is made for vehicles with SCR code U42 and Blue Tec engines starting in 2010. Perhaps the standout feature of this brand is the no spill anti-over fill feature built into the nozzles of each bottle. It makes it incredibly easy to fill up and apply without spills.
In terms of quality, we find it slightly worse than the previous two brands we mentioned, but the difference is negligible. The trade-off is that you get a bottle that is much easier to use. Now it is also a bit more expensive than most other brands, so you need to take that into consideration as well.
#4.ACDelco Diesel Exhaust Emissions Reduction
The ACDelco Diesel Exhaust Emissions Reduction Fluid is certainly a name brand when it comes to DEF fluids. It meets GM OEM vehicle specifications and can be used in non-GM diesel. This is as long as the vehicle has a Selective Catalytic Reduction system to meet regulated NOx emissions. We also like that contains no chemical additives that could cause a SCR system failure.
We also like the fact that it includes a few vented nozzles which helps make pouring incredibly easy. It also helps to prevent glugging, which is a nice bonus. All in all, ACDelco is a trusted and reliable brand in making quality auto fluids. We would not question their quality and think that it is definitely a safe choice.
#5.Genuine Ford Fluid Diesel Exhaust Fluid
Lastly, we have the Genuine Ford Fluid Diesel Exhaust Fluid, which does a wonderful job in reducing NOx emissions in diesel vehicles with an SCR catalyst. In our opinion, this stuff works great for its intended purpose. It is also an AUS32 fluid and meets all the requirements of ISO 22241 and DIN70071 as well as all the purity standards.
It is also an original OEM product so you can pretty much trust the quality and reliability. Plus if you order it online, it’ll be much cheaper than at the dealer. If you have already tried everything we recommend above and are still not satisfied, we strongly urge you to give the Ford DEF Fluid a try.