Diesel Exhaust Fluid · 3,656+ pumps mapped · 28 chains

DEF at the
pump.
Not in a box.

Find a working bulk DEF dispenser near you — in a lane your truck actually fits. Stop overpaying for jugs.

3,656+DEF pumps mapped
28chains covered
48states
✓ Freeno login needed
By interstate

On the road?

Find DEF stations along the interstates you're driving. Filter by specific state segments for the most useful results.

I-80I-90I-70I-40I-10I-75I-95I-35 All interstates →
How it works

Three taps from
"where?" to "filled."

01

Search where you are

Drop in a city, ZIP, or highway exit. We map every bulk DEF dispenser nearby — not the jug shelf at the parts counter.

02

Check the status

See lane type, price per gallon, and whether it was confirmed working by a driver who just filled up. No more bagged-off pumps.

03

Skip the jugs

Bulk DEF at the pump runs 70–80% cheaper than boxed jugs. Fill up fresh and get back on the road.

Why bulk

The pump beats the box.
Every fill.

Jugs run $9–14 a gallon and leave you a stack of empties. Bulk DEF off the pump is roughly a third of the price, measured to the tenth, no funnel, no spill.

~$9 saved per 10-gal fill
Learn more about bulk DEF
At the pump In a jug
Price / gallon $2.79 $11.49
10-gal fill $27.90 $114.90
Spill risk None Funnel + luck
Empties 0 4 jugs
Convenience At the pump Find & carry
Built by the crowd

Know a pump we're missing?

Every dispenser on the map was added by a driver. Confirm one you've used and the next RV, boat, or work truck rolls in knowing it's up.

3,656+ DEF pumps mapped
28 chains covered
50 states represented