Another related trick...

It pisses me off that all comercial fuel bowsers have the catch disabled so you can just set the trigger on and walk away. What I do these days, is pull the trigger and jam your fuel cap underneath it to keep it opened. Then go wash your windscreen, lean against the bonnet looking cool, check oil etc.

*disclaimer - may be a reason they are disabled. Always ground your vehicle before filling up.

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Twin scroll Pig Bi-Squeeling