I’m a mechanic with more than 55 years of experience – here’s why you should never overfill your car with petrol

A veteran mechanic has revealed why drivers should never overfill their cars with gas.

Scotty Kilmer, who has 55 years of experience, explained the rationale for the tip, which could help motorists avoid a costly repair.

Scotty Kilmer explained everything in a TikTok video


Scotty Kilmer explained everything in a TikTok videoPhoto Credit: Tiktok/@scottykilmerofficial

Scotty said: “I’m going to tell you why you should never fill your tank to the brim when you’re at the pump.

“And not just because you don’t want to create chaos and distribute petrol everywhere.”

The short clip then shows the view of the opening of a car’s gas tank.

Scotty explained that there are two holes on the inside of the gas cap.

He said: “If you overfill your tank, put petrol in the Evap (Evaporative Emission Control System) canister.

It is used to prevent gasoline vapors from the fuel tank and fuel system from escaping into the atmosphere.

The expert warned the replacement could cost hundreds of pounds.

Scotty advised you to stop filling your tank when you fill up and the pump shuts off.

The footage was uploaded to the @scottykilmerofficial TikTok page, which has 761,000 followers.

It was a major attraction on the social media page, garnering 515,000 views and around 33,000 likes and more than 600 comments.

One commenter wrote: “People fill it up AFTER it’s stopped? I didn’t even think it was possible.”

Another admitted they were guilty of overcrowding, saying: “I’m terrible at this ok I’ll stop it!”

A third added: “I always try to tell people that but most don’t listen.”

And if you haven’t gotten to the gas station yet, we’ve explored six ways you can extend the life of your gas tank.

We also have some simple ideas you can use to reduce your gas costs.

And the very simple trick you’ll want to know if you forget which side of your car the gas cap is on.

Overfilling could result in gasoline spilling into a can


Overfilling could result in gasoline spilling into a canPhoto Credit: Tiktok/@scottykilmerofficial


TaraSubramaniam is a Dailynationtoday U.S. News Reporter based in London. His focus is on U.S. politics and the environment. He has covered climate change extensively, as well as healthcare and crime. TaraSubramaniam joined Dailynationtoday in 2023 from the Daily Express and previously worked for Chemist and Druggist and the Jewish Chronicle. He is a graduate of Cambridge University. Languages: English. You can get in touch with me by emailing: tarasubramaniam@dailynationtoday.com.

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