DEF Additive

[Paul127]

Has anyone done the cost comparison for the cost of DEF at the pump compared to at the store in a container? Which is cheaper?

[AikenRacer]

Agree, the pump is cheaper but after experiencing the hassle of filling a jug or competing with the truckers for the pumps, etc. I choose to use the containers from Sams. A lot less hassle and it isn't a big expense anyway.

[Garry_Gayle]

I refill my 2.5 gal jug when at the pump while filling the DEF tank.

[Two_Jayhawks]

Yes pump is cheaper by a lot. I also prefer to use the store bought product as Newmar put the fill on the wrong side.

[rr2254545]

No question at the pump is cheaper but on my MH 2012 the fill is on the wrong side so I buy it in the 2 1/2 gal jug. Cheapest place I have found it at my diesel repair shop