BlueDEF Diesel Exhaust Fluid Synthetic Urea Deionized Water 2.5 Gallon (5 Pack)

BlueDEF works exactly as it should—keeps my truck running smooth with no issues. The price at Sam's is hard to beat, and the jug design makes it easy to pour without spills. Always consistent quality.

I've been using this kind of DEF in my trucks since 2018 and I've never had a problem I will continue to use it and recommend it. Sam's has the best price for it.

Good product at a great price. The pour spout consistently works well and it's stored in a cool area instead of on a sidewalk out in the sun or in the garden department.

Great price and a bet good brand! My husband used it in his F350 when we are pulling our 5th wheel. Highly recommend.

Very easy to use. Flexible hose is long enough to be placed into the filler tube on the car while keeping the box upright.

I use this because I can't trust the def at gas stations when I bought my Mercedes the guy recommended going to Walmart but I find a better deal at Sam's

Sam's definitely has the lowest price for DEF. There isn't much else to say about this product other than it keeps my truck's message display from yelling at me.

Great Price for needed fluid

Be careful lifting the box, using the handle on top. The cardboard rips/breaks easily. As a result, I dropped the box and it made a mess. If it were usable, it would have been nice because this one has the accompanying funnel for pouring it into the car's reservoir.

Pouring spout is manufactured such that the breather flap ends up in the wrong position once screwed into place and then leaks. This product is also way more expensive than any other brand of DEF. After all, it is only urea so why pay more?