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Apr 29, 2018 | 06:07 PM

Electricjoe

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Def

Hi I have a 2017 f250 6.7 diesel looking for a locking cap for def cap

Apr 29, 2018 | 06:25 PM

senix

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Joined: Aug 2008

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From: Frederick, MD

check amazon, why do you need it to lock?

Apr 29, 2018 | 08:43 PM

my_crib_too

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Joined: May 2012

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From: Door Cty/Florida

Most seem to go for a locking fuel door and not a locking cap for the fuel and a second lock for the DEF cap. If you lock one, seems like you would need to lock the other cap too. I dropped "ford f250 2017 locking fuel door" into google and see lots of options.

Welcome to FTE.

Bruce...

May 3, 2018 | 10:52 AM

troverman

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Joined: Apr 2013

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From: NH

DEF isn't worth much, so unless you are worried about someone dumping something maliciously into your DEF, I wouldn't bother. Even if they did, the DEF system is a lot cheaper to repair/replace than the fuel system.

May 3, 2018 | 02:43 PM

HRTKD

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Joined: Oct 2015

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From: Wyoming

When I was looking for one last year there simply wasn't a locking DEF cap for the 2017+ available. I have a locking cap for the diesel and someday I'll actually put it on.

May 6, 2018 | 10:22 PM

GT4point6

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Joined: Mar 2005

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Quote:

Originally Posted by my_crib_too

I use a locking fuel cap, stock DEF cap.

I didn't go the locking door route because if they want your fuel, they will pry the door open, then you are out the door/damage to the truck, and the fuel they take.
Never heard of anyone having their locking caps broken into.