Why You Shouldn’t Wait To Replace Your Standard Fuel Caps

October 25, 2018
min read

Most people don’t understand why standard fuel caps are so important, or why there are rules and inspections governing them. However, they are an essential part of your vehicle’s operation and safety system. If you remove the cap to get gas and forget to put it back on or leave it behind, it’s imperative to get a new one as soon as you can. Likewise, if it looks worn or cracked, or gets stolen, it may be best to get a new one, and you may want to consider locking varieties.

The Difference Between Standard And Locking Varieties

Original parts are usually the minimum requirements, especially for manufacturers that generate hundreds of cars a week. Therefore, they may not provide a locking cap, but it will still provide protection from emissions and vapors escaping. Standardized versions may not prevent theft or tampering, but they can still help you save a little money at the pump.

Did you know that if you drive without fuel caps, either locking or standard, you can waste up to 30 gallons of gasoline each year? Most people don’t know that fun little fact, and it could be costing them hundreds of dollars or more, depending on where they live and the price of gas.

Emissions Testing

A gas cap helps your system normalize the air pressure inside the tank, which is an essential function. Without such, the pressure could rise too much, which can cause leaks and other problems. Likewise, if your gas cap is gone, you will fail state inspections (emissions testing). Something so small and seemingly insignificant, can be the downfall of your test and require you to fix the problem and retest later. It’s better just to buy a new cap, as they’re an inexpensive fix.


Many people have a check engine light that comes on at random times, turns on a few miles down the road, or stays on all the time. If you’ve checked everything else or just don’t know where to start, it may be time to consider a replacement cap. You may not even notice anything untoward, but there could still be tiny cracks or a busted seal, which can cause your engine light to come on.

How To Find

It’s easy to find a new gas cap, but you must ensure that it will pass all tests and meet all requirements of the Federal government.


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