Which brand of def fluid.

True. He wants to sell the house brand. Otherwise, it doesn't matter the brand.

Take it from a retired chemist: all DEF is Urea dissolved in distilled water. It is all the same.

agesilaus wrote:
Take it from a retired chemist: all DEF is Urea dissolved in distilled water. It is all the same.

Good to know information. Thank you.

Wikipedia- Diesel Exhaust Fluid

Truck stops, busy truck stops.

Don

I'm sure he would only recommend Ram floor mats too if you asked him.

I have been using the bulk DEF at truck stops. So far so good...and much cheaper than DEF in containers.

Your manual, and I assume this is true for the Powerstroke and Duramax as well, just calls for API certified DEF. Walmart Super Tech is API certified and runs a bit over $8 per 2.5 gallon jug, and I've used it without issues - it's more convenient for me than driving across town to get it at a pump. I don't see a reason to pay more for the name brand stuff - it probably comes from the same factory anyway.

IdaD wrote:
Your manual, and I assume this is true for the Powerstroke and Duramax as well, just calls for API certified DEF. Walmart Super Tech is API certified and runs a bit over $8 per 2.5 gallon jug, and I've used it without issues - it's more convenient for me than driving across town to get it at a pump. I don't see a reason to pay more for the name brand stuff - it probably comes from the same factory anyway.

Which is 1.75 to 2.00 higher than at a truck stop. Buying from a truck stop gets you the freshest Deffects and you only buy what you need to fill the tank.

Don

Perrysburg Dodgeboy wrote:

IdaD wrote:
Your manual, and I assume this is true for the Powerstroke and Duramax as well, just calls for API certified DEF. Walmart Super Tech is API certified and runs a bit over $8 per 2.5 gallon jug, and I've used it without issues - it's more convenient for me than driving across town to get it at a pump. I don't see a reason to pay more for the name brand stuff - it probably comes from the same factory anyway.

Which is 1.75 to 2.00 higher than at a truck stop. Buying from a truck stop gets you the freshest Deffects and you only buy what you need to fill the tank.

Don

But it also gets you the highest risk of contaminated DEF as well compared to a sealed container.

I've been running the API rated stuff in a container for almost 4 years and 92k miles without a single DEF issue.

Have always used Peak Blue 2.5 gal containers. I find it comical that guys get bent out of shape about the miniscule cost of DEF on a $50k+ truck. The amount you'll save on at the pump DEF might get you a free tank of fuel over the life of the truck. Yippee...

Bottom line is use whatever is most convenient and dont buy into dealer rhetoric B.S. about how their overpriced stuff is superior. Its not... There are only a handful of DEF producers which sell the same stuff under different brands/names.