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Motorad MGC-791 Locking Fuel Cap

by Motorad
| 62 answered questions

List Price: $18.84
Price: $10.38 & FREE Shipping on orders over $35. Details
You Save: $8.46 (45%)
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Ships from and sold by Amazon.com.
  • Deters vandalism and fuel theft
  • Manufactured with OEM quality materials and safety standards
  • Specifically designed pressure and vacuum relief valves to prevent evaporation of fuel
  • A leaking fuel cap can allow up to 30 gallons of gasoline to evaporate over the period of a year
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$10.38 & FREE Shipping on orders over $35. Details In Stock. Ships from and sold by Amazon.com.

Frequently Bought Together

Motorad MGC-791 Locking Fuel Cap + Motorad MGC-912 Locking Fuel Cap
Price for both: $22.50

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Product Information

Technical Details
BrandMotorad
Item Weight3 ounces
Product Dimensions4 x 3 x 3 inches
Item model numberMGC-791
Manufacturer Part NumberMGC791
  
Additional Information
ASINB000C5CEKC
Best Sellers Rank #768 in Automotive (See top 100)
Shipping Weight4 ounces (View shipping rates and policies)
ShippingThis item is also available for shipping to select countries outside the U.S.
Date First AvailableOctober 10, 2007
  
Warranty & Support
Warranty, Parts: Parts
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Product Description

Motorad fuel caps are designed and manufactured to be consumer friendly both non locking and locking caps. All fuel caps include venting as required, positive closer cover, and optional locking cover. Motorad fuel caps have been independently tested for emission control effectiveness, ability to remain sealed after a side collision, integrity of cap simulating a 90 Km/h collision, tip test and vent test.

Customer Questions & Answers

Customer Reviews

Seems like a sturdy, well made product.
Potter
You never know when you'll need to keep someone out of your tank!
Kirk A England
Check engine light came on because of this cap.
A. Duca

Most Helpful Customer Reviews

68 of 69 people found the following review helpful By Momdabomb on June 11, 2012
Verified Purchase
I purchased this locking gas cap because I live in a neighborhood where things tend to disappear overnight. I awoke at 2 am one night because I could hear someone outside my window. And wouldn't ya know it, someone was sucking gas out of my tank not 12 feet away. Not only did they take most of the gas but they ripped off the cap for my tank too.
It's just too darned expensive to leave my gas up for grabs so I snapped this up when I saw that it was only 6 bucks. I have had this cap on my car for 3 weeks now and the only time the gas needle moves is when I have been driving my car, which is exactly how I like it. The lock itself is very easy to use and its easy to tell when its not locked properly. When it is locked correctly, the top of the cap spins in place but won't unscrew from the tank. By my estimation, this cap has already paid for itself 3 times over.
Since it has only been a few weeks I will update this post later to let you know how it holds up, or holds out.

Up-date 10/24/2012:
The Gas cap is still going strong. Someone tried to pick the lock to get at the tank the other night. I can see the scratches where they were trying to pry it off. I am glad to report that they did not succeed. I think it's safe to say I am well pleased with the performance.
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26 of 30 people found the following review helpful By R. Stone on December 22, 2012
Verified Purchase
This is a good locking gas cap for the price. The only problem is it needs instructions with it. One might not think so, but this cap locks differently than any other that I have owned in the last 40 years. This is not necessarily making it a bad thing, just different. Just a 4-inch by 4-inch piece of paper with brief instructions on it.
Remove key, screw in cap clockwise until it clicks, replace key, turn key clockwise until it stops, remove key (Locked). To (unlock) insert key, hold cap, turn key clockwise until it stops, unscrew cap.
I believe the different way this cap locks, and lack of instructions is the reason for many of the bad reviews.
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8 of 9 people found the following review helpful By ***imager*** on August 5, 2012
Verified Purchase
***

although not listed in the look up, this model will fit a 1994 dodge ram250 van.

to lock:

turn gasoline cap clockwise until resistance is met; then turn the key clockwise and remove.

to unlock:

turn the key counterclockwise until resistance is met; then turn gasoline cap counterclockwise until it comes off.

on my van it fits properly and does not cause the 'check engine' warning to activate and remain lit.

i would not consider build quality of the lock assembly hefty, but acceptable for one who wants to prevent others from accessing the gasoline tank.

***
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4 of 4 people found the following review helpful By IAW BEST on February 16, 2015
Verified Purchase
For 2014 Toyota Tundra. I don't write many reviews but I'm compelled to on this one. This cap will not seal when locked. No matter what you do, tighten cap until it clicks 3 times or 50, as soon as you turn the key to lock the cap, it gets loose and will trigger evap. leak Check Engine light. If you mess with it SEVERAL times you might get lucky and it will seal, but that is only until next fill up. I'm a auto technician and know what I'm doing, I've tried this cap now for 3 months and it wont seal almost every time I fill up and that's attempting to get it tight over and over, twist lock check, twist lock check and hope it's tight only to have Check Engine light come on a day later.
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4 of 4 people found the following review helpful By Zeke on September 6, 2013
Verified Purchase
It works good and fits tight. Just remember to hold onto top of cap when using key otherwise you can be turning the key forever.
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3 of 3 people found the following review helpful By Brad Rafferty on February 19, 2015
Verified Purchase
Waste of $$$, not even worth the postage to return it. It fit my vehicle at first, but as time passed (approx 1 month) the fuel light came on. No amount of adjusting of the cap worked out. Running a car with a ill fitting gas cap can create all sorts of havoc, so I had to replace this with the original cap. Unfortunate because I really wanted a locking gas cap.
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3 of 3 people found the following review helpful By R. Appleby on August 27, 2014
Verified Purchase
Fits perfect on my 2008 Toyota Tundra. This model truck does not have a switch inside the cab to release the fuel door, which makes me nervous. I know that it isn't the most secure thing in the world but it is a deterrent. I would recommend for anyone looking for a locking gas cap. Once locked, the outer portion of the cap just spins freely.
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7 of 9 people found the following review helpful By John Ennis on July 4, 2011
Verified Purchase
This gas cap works great as a gas cap. In fact, when I switched this cap out, my check engine light went out. FInally. I just can't get the key in the cap without it feeling like I am going to break it. So what I did is not lock it at all.
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Motorad MGC-791 Locking Fuel Cap
This item: Motorad MGC-791 Locking Fuel Cap
Price: $18.84 $10.38
Ships from and sold by Amazon.com