Stant 10506 Locking Fuel Cap Review

This cap seemed good at first.However closer inspection reveals that this will only deter the least determined of gas theives, and is more of a visual deterrent then an actual security device.

A close look at the design of my filler neck reveals the nubs on the cap just sit behind the guides on the filler neck.They don't lock in.What this means is that if you pull up on the cap and turn, there is a friction battle between where the spinning top contacts the base of the cap and the nubs against filler neck.Guess which has less friction... the nubs against the filler neck.For this design to work, the cap would need to spin on ball bearings, or something else that has less frictionthen the nubs against the filler neck.

Bottom line: If you pull up on the locked cap with gentle to moderate force and turn the cap, it comes right off.The design of the filler neck plays a role, so this may not be true for all cars, however it is true for my Saturn Ion.

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Product Description:
Stant locking gas caps are OEM quality both in construction and materials as well as deterrent to fuel theft and vandalism. A gas/fuel cap performs three very important functions; safety of the vehicle's occupants, fuel economy and reduce emissions. Safety: Without a fuel cap, gasoline vapors will be present around your car at all times. Those vapors can be ignited by a random spark or flame and are very dangerous if you are involved in an accident or rollover. Fuel Economy: According to Sun Oil Company research, a vehicle with a missing or inoperative fuel cap will allow 176 pounds (22 gallons) of gasoline to evaporate over the period of one year. Emissions: Gasoline vapors emit hydrocarbons which dissolve the earth's ozone layer and cause smog.

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