Prices for diesel exhaust fluid are stable in both the U.S. and Canada.
Diesel Exhaust Fluid Prices Nearly Unchanged
The national average price of DEF at truck stops islands was $2.79 per gallon in the U.S., a decline of one-cent from the month before.
The national average price of DEF at truck stops islands was $2.79 per gallon in the U.S., a decline of one-cent from the month before, which has been the average price since November 2012, according to a new report from Integer Research and its DiscoverDEF.com website.
In Canada, the price remained unchanged at 80 cents per liter, where it has been since October 2011.
The national average for tote refill prices dropped four cents in the U.S. to $1.87 per gallon and one cent in Canada to 55 cents per liter.
Metropolitan area located in the West Coast and in the Central & Southern region posted the highest average prices, while St. Louis, Mo. registered the lowest average prices amongst all areas covered this month.
DEF is used in diesel engines with selective catalytic reduction (SCR) to lower NOx (nitrogen oxide) concentration in emissions.
More Fuel Smarts

Vanair Introduces Solar, Battery Power Ecosystem for Class 8 Trucks
The company’s expanded EPEQ ecosystem includes flexible solar panels, lithium batteries, hydraulic power systems, and a portable fast charger for electric trucks.
Read More →
Run on Less “Messy Middle” Data Shows Multiple Paths for Truck Powertrains [Listen]
Listen as Mike Roeth of the North American Council for Freight Efficiency shares insights into battery-electric trucks, natural gas, biofuels, and clean diesel on this episode of HDT Talks Trucking.
Read More →
Run on Less “Messy Middle” Data Shows Multiple Paths Forward for Truck Powertrains [Watch]
NACFE's Run on Less - Messy Middle project demonstrates the power of data in helping to guide the future of alternative fuels and powertrains for heavy-duty trucks.
Read More →
Trucking Executive Warns Fuel Spike from Middle East Conflict Hitting Fleets Fast
Mike Kucharski, vice president of refrigerated carrier JKC Trucking, says diesel price jumps tied to global instability are squeezing carriers already struggling with weak freight rates.
Read More →
Smarter Maintenance Strategies to Keep Trucks Rolling
In today’s cost-conscious market, fleets are finding new ways to get more value from every truck on the road. See how smarter maintenance strategies can boost uptime, control costs and drive stronger long-term returns.
Read More →
Researchers Demonstrate Wireless Charging of Electric Heavy-Duty Truck at Highway Speeds
Purdue researchers demonstrated a high-power wireless charging system capable of delivering energy to electric heavy-duty trucks at highway speeds, advancing the concept of electrified roadways for freight transportation.
Read More →
EPA Wants to Know: Are DEF De-Rates Really Needed for Diesel Emissions Compliance?
The Environmental Protection Agency is asking diesel engine makers to provide information about diesel exhaust fluid system failures as it considers changes to emissions regulations.
Read More →6 Dashcam Tactics to Improve Safety & ROI
6 intelligent dashcam tactics to improve safety and boost ROI
Read More →
California: Clean Truck Check Rules Still in Force for Out-of-State Trucks, Despite EPA Disapproval
The Environmental Protection Agency said California can’t enforce its Heavy-Duty Inspection and Maintenance Regulation, known as Clean Truck Check, on vehicles registered outside the state. But California said it will keep enforcing the rule.
Read More →
Justice Department Pulls Back on Criminal Prosecution of Diesel Emissions Deletes
The Trump administration has announced it will no longer criminally prosecute “diesel delete” cases of truck owners altering emissions systems in violation of EPA regulations. What does that mean for heavy-duty fleets?
Read More →
