DEF
Cargo Master
Joined: Oct 2019
Posts: 2,852
Likes: 1,199
From: Southeast MO
Anything that is API certified and not out of date should work fine. My dealer told me to try to stay away from the bulk pumps because they have seen several trucks with bad DEF after filling up at truck stops. Maybe this is a local thing though and I am sure lots of people use these pumps without problems. I typically buy the stuff from the local farm store for $5.99 a cube.
Posting Guru
Joined: Jun 2018
Posts: 1,366
Likes: 186
From: Frederick, CO
Walmart. I've never seen DEF at a pump, though I know they exist. Around here, I think maybe they're mainly at the Pilot, Flying J, Love's and other truck stops. But, around here, truck stops are $0.40 - $1.20/gal more expensive for diesel fuel. That's way too high a premium to pay for convenience and slight cost improvement of DEF.
With the 7.5 gal DEF tanks, filling is super easy. Just wait until the warning light comes on and you have both (1) PLENTY of time to grab 2 x 2.5 gal jugs of DEF at Walmart at your convenience and (2) plenty of capacity to take 5 gallons (so no need for the Ford funnel or any other device). At the next fuel-up, I grab those 2 x 2.5 gal DEF jugs and pour them in. They come with their own spouts and, as mentioned, you don't have to worry about overfill or anything like that. Dump both in and you're at 85-95% full ... off you go. Easy peasy.
With the 7.5 gal DEF tanks, filling is super easy. Just wait until the warning light comes on and you have both (1) PLENTY of time to grab 2 x 2.5 gal jugs of DEF at Walmart at your convenience and (2) plenty of capacity to take 5 gallons (so no need for the Ford funnel or any other device). At the next fuel-up, I grab those 2 x 2.5 gal DEF jugs and pour them in. They come with their own spouts and, as mentioned, you don't have to worry about overfill or anything like that. Dump both in and you're at 85-95% full ... off you go. Easy peasy.
Trending Topics
Senior User
Joined: Apr 2017
Posts: 399
Likes: 1
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Fleet Owner
Joined: May 2015
Posts: 21,195
Likes: 306
From: Near Salmon Arm BC
Anything from any sort of even somewhat respectable store should be fine.
It is just DEF after all....not some special life saving medicine for an infant.
I have used about 20 brands from 20 different places in the fleet trucks...can't tell the difference.
It is just DEF after all....not some special life saving medicine for an infant.
I have used about 20 brands from 20 different places in the fleet trucks...can't tell the difference.
