# Locking gas cap?

**URL:** <https://community.cartalk.com/t/locking-gas-cap/16252>\
**Category:** Maintenance/Repairs\
**Created:** [July 5, 2008, 3:29pm UTC](https://community.cartalk.com/t/locking-gas-cap/16252 "2008-07-05T15:29:50Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Brian\_Beaulieu](https://avatars.discourse-cdn.com/v4/letter/b/90db22/32.png) [@Brian\_Beaulieu](https://community.cartalk.com/u/Brian_Beaulieu)\
**Post date:** [July 5, 2008, 3:29pm UTC](https://community.cartalk.com/t/locking-gas-cap/16252/1 "2008-07-05T15:29:50Z")

</div>

I’m thinking about getting a lockng gas cap for my van, which has a 33-gallon tank. Someone said that there is no need for one since modern filler necks won’t allow syphoning. Is that true?

---

<div class="post-metadata">

**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [July 5, 2008, 3:58pm UTC](https://community.cartalk.com/t/locking-gas-cap/16252/2 "2008-07-05T15:58:43Z")

</div>

Depends on the year of the vehicle. Newer vehicles have an anti-overfill valve so gas can’t be syphoned.

Tester