Diesel engines power businesses, trucks, and everyday life, but they also produce NOx emissions that must be strictly controlled.
That’s why modern diesel vehicles and trucks use the SCR emissions system, powered by UREA inside Diesel Exhaust Fluid (DEF), a solution sprayed into the exhaust to turn harmful gases into nitrogen and water, two safe elements released into the air without affecting performance.
At American Petroleum, we supply high-purity DEF for personal vehicles and business operations, with island-wide distribution and support from our expert, dedicated account representatives.
What is UREA in car and truck for diesel engines
UREA is the active compound inside DEF that enables Selective Catalyst Reduction (SCR), the exhaust after-treatment system installed in diesel engine exhaust lines. In the SCR module, DEF is atomized and injected into the burned exhaust gases to activate a catalytic chemical reaction that converts NOx into nitrogen and water, both harmless environmental byproducts safely released through the exhaust.
Why UREA is used in cars and trucks in diesel engines
UREA is required in diesel engines as the main compound in DEF to power the SCR emissions-reduction reaction that neutralizes NOx at a standardized 32.5% concentration, the globally validated catalytic conversion ratio used in diesel cars and trucks to meet environmental regulations efficiently and continuously through the exhaust stream.
Why add UREA to diesel
UREA enables the SCR chemical emissions-reduction process that neutralizes NOx, protects air quality, and ensures compliance with strict diesel emissions standards without affecting engine reliability or vehicle operation, sustaining clean diesel mobility and environmental responsibility through catalytic conversion behavior in the exhaust stream.
Why add UREA to burned diesel exhaust gases?
UREA is never added directly to diesel fuel. It is injected into burned exhaust gases to power the SCR NOx catalytic conversion reaction. When the DEF tank is critically low, the SCR system cannot neutralize NOx effectively, and vehicles may automatically apply engine protections, such as speed or power limitations, to prevent untreated NOx from being released and out of environmental compliance.
What is UREA in DEF made from
UREA in DEF is made from ultra-high-purity synthetically manufactured industrial-grade UREA compounds combined with distilled or deionized water at 32.5%, the globally standardized catalytic conversion concentration ratio proven to maximize NOx neutralization efficiency inside automotive and industrial SCR exhaust after-treatment systems while maintaining safe freezing and vaporization behavior.
What is UREA level in car
The UREA level refers specifically to the DEF emissions tank fluid volume, which modern diesel vehicles monitor electronically through dashboard gauges or digital indicators. Maintaining correct DEF/UREA levels ensures the SCR system operates properly and prevents automatic speed or power restrictions that activate to protect environmental compliance if the DEF tank fluid becomes insufficient for catalytic NOx conversion.
American Petroleum is your trusted UREA-based DEF supplier in Puerto Rico
American Petroleum supplies high-purity UREA-based DEF for diesel cars, trucks, fleets, generators, marine, agriculture, construction, and industrial engines across Puerto Rico.
We offer 2.3-gallon jugs for fast refills, 55-gallon drums for higher demand as well as in bulk for any amount required, hydraulic oils, industrial lubricants, and island-wide delivery, supported by dedicated account representatives who help coordinate orders, deliveries, and payments quickly and reliably.
Interested in this product? Contact us by email at info@americanpetroleumpr.com or reach out directly to your American Petroleum account representative to validate compatibility, place orders, and coordinate fast delivery anywhere on the island.
Works cited:
- International Organization for Standardization. ISO 22241: Diesel engines—NOx reduction agent AUS 32 (DEF specifications). 2022.
- U.S. Environmental Protection Agency. “Nitrogen Oxides (NOx), Why and How They Are Controlled.” 2023.
- DieselNet Technology Guide. “Selective Catalytic Reduction (SCR) for Diesel NOx Control.” 2023.
- Kruse, Adam. Diesel Emissions Systems and UREA Catalytic Reactions in Exhaust After-Treatment. Engineering Press, 2021.