One of the most important considerations when trying to get out stains caused by gasoline is safety, because gasoline is, by its very nature, flammable.

For any of the methods listed below it is essential that you do not use heat to remove the stain, such as placing the item in the dryer until you know the item has all gasoline removed from it.
Step 1: Place an absorbent, such as cornstarch or baking soda, onto the gas stain, and let it set for approximately half an hour, to absorb as much gasoline as possible.
Step 2: After this time has elapsed scrape or brush off the absorbent, which has absorbed some of the gasoline.
Hint: Depending on the amount of the gasoline spilled you may need to repeat this step until no more gas is absorbed by the baking soda or corn starch.
Step 3: Pretreat the stain with a laundry prewash stain remover.
Step 4: Launder in the hottest water the fabric will allow to get out the stain.
Step 5: Let the clothing air dry while you confirm that the stain has been removed. If it has not, repeat steps 3-4 as needed.
Safety tip: Do not place the clothing into the dryer after washing, because it is difficult to determine while the clothing is wet if all the gas has been removed. If it is not this can pose a fire hazard because of the flammability of gas, so just air dry the clothing until you can confirm no gasoline remains.
You may also find this video giving stain and odor removal tips for gasoline from clothing helpful.
Further, here is some advice I have when trying to remove gasoline from clothing when it didn't come out with a normal wash, in response to a reader's question.
Step 1: Place an absorbent, such as cornstarch or baking soda, onto the gas stain, and let it set for approximately 15 minutes.
Step 2: Scrape or vacuum up the absorbent, which has absorbed some of the gasoline.
Hint: Depending on the amount of the gasoline spilled you may need to repeat this step until no more gasoline is absorbed by the baking soda or corn starch.
Step 3: For the gasoline still remaining take a clean white cloth and sponge the stain with a dry cleaning solvent.
Hint: First, be sure to test this solvent on an inconspicuous area of the upholstery to make sure it is safe.
Step 4: Next, blot at the stain until the solvent is absorbed.
Step 5: Repeat steps 3-4 until the stains are removed from the upholstery.
You can get more information on how to clean upholstery here.
The instructions for removing stains from gasoline from carpet is the same as for upholstery.
Are you a stain magnet like me? If so, check out the A to Z Stain Removal Guide which gives directions for how to remove over 100 types of stains from all kinds of surfaces.
Below are examples of the most common stains discussed in the Guide.
Photo by FeatheredTar

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CAUTION: This website is provided for informational purposes only, and Stain-Removal-101.com provides it as is, without warranties or guarantees. Some stains just won't come out, and are permanent. Further, some stain removal methods can harm your item, so if the stained item is sentimental or expensive call a professional. See disclaimer of liability for more information.
See the A-Z Stain Removal Guide for even more types of stains.
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