def

ACZL wrote:
I think what lynmore was alluding to was some folks who buy DEF at truck stops fuel lanes accidentally put the DEF in the fuel tank as both the DEF and fuel fills are in same fill location behind fuel cap (at least w/ Ram and Ford).

You REALLY have to NOT be paying attention to what you are doing to allow the above scenario to happen..I've NEVER had that issue...On the Ram, the fuel filler neck is large enough to take the large fuel pump like big rigs use, and has a GREEN outer ring around the filler neck that say's in BIG BLACK BOLD LETTERING, "DIESEL ONLY"....(most Ram owners have purchased some type of cover for this capless fuel filler opening...(me included)....While on the other hand, you have a VERY SMALL DEF filler neck that has a BLUE screw on cap that states "AdBlue"...."DEF"....

"IF" I fill up with diesel and DEF at the pump, I fill with diesel first, (lid still on the DEF opening)...Finish diesel fill, remove diesel fuel pump, cover diesel fuel opening with my cap, THEN, unscrew the DEF cap and insert the VERY small DEF nozzle into filler hole and fill, when done, I put the cap back on the DEF filler neck opening...

Didn't own a DEF truck until May of 2013, and have never made the mistake of putting fuel in the DEF tank or vice-versa....I've also, as stated earlier, never had the first issue with getting "bad" DEF at a truck stop..I kept my fuel/DEF compartment very clean and also wipe down inside after refueling or adding DEF, (though I've never had an overflow incident or ran over into the compartment containing the DEF or Diesel fuel filler necks.

With Semi's using large volumes of DEF, from the research I've done, it appears that the tanks of DEF are replenished often enough to where the DEF is "fresh"..as opposed to someone, purchasing a 2.5 gallon of DEF to have, "just in case", never use it to where it is passed it's recommended time to use it and have to throw it away, or are tempted to use it and THAT might cause more of an issue than getting it at a truck stop.