DEF.....what are you using
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Tuned
Joined: May 2009
Posts: 321
Likes: 4
DEF.....what are you using
so my first fill of DEF is coming up. Are you guys paying the 30$/2.5 gal motorcraft wants????
is all DEF created equal??? Walmart has def $8.99/2.5 gal. Peak blue def sells for $10/2.5 gal. Valvoline for 12$
They are all 32.5% Urea.....
is all DEF created equal??? Walmart has def $8.99/2.5 gal. Peak blue def sells for $10/2.5 gal. Valvoline for 12$
They are all 32.5% Urea.....
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Post Fiend
Joined: Apr 2004
Posts: 5,158
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From: North of Salt Lake City
DEF usage is dependent upon exhaust temps. Nitrous Oxide (?) is caustic and produced at high temps like when you're towing. The DEF woks as a catalyst to convert the NO into inert gasses. If you tow a lot, you use more DEF.
Hotshot
Joined: Apr 2013
Posts: 10,118
Likes: 650
From: NH
I typically have the dealer refill it at oil change time. In a few hundred more miles, I'll be at 5k and will have the oil changed. Right now, DEF is less than 1/4 and I'm expecting the warnings to start soon.