DEF at the Pump

What this is

DEFatthePump.com is a directory of fuel stations that sell Diesel Exhaust Fluid (DEF) at the pump — not just inside in jug form. We map truck stops, travel centers, and gas stations where you can dispense bulk DEF directly into your tank.

We currently have 3,656+ locations across 28 chains in all 50 states. Our data comes from publicly available chain locators and APIs, then is cleaned and maintained by our team.

Who it's for

This site is primarily for non-semi drivers who need DEF: diesel pickup owners, diesel RV drivers, boat owners, and anyone running SCR-equipped diesel equipment. Truck stops are built around this — but if you're in an F-350 or a Class A diesel pusher, finding a DEF pump that fits your rig is harder than it should be.

Data accuracy

Our location data comes from chain APIs and website scrapers and is accurate to the best of our ability at time of collection. DEF pump availability, operational status, and pricing change frequently. Always call ahead if you're making a special trip.

Crowd verification (driver confirms that a pump is working) improves the signal — but most listings start as unverified. We're building the verification system now.

Also check out Pumpworthy.com — the same concept for ethanol-free (E0) gasoline. Built by the same team.