Review on Motorad MGC 907 Locking Fuel Cap by Christopher Smith

Advantages: Effectively protects your gas from theft Easy to use and install Low cost Comes with 2 keys Disadvantage: Can cause the check engine light with error codes for large / small evaporator leak (you have to tighten it really hard to prevent this) When the head is "locked" it spins freely so you have to hold the cap to unlock/lock it (a bit awkward). Overall I recommend this for a medium quality fuel cap, especially if you drive around town a lot.