Shadeux (Forum Supporter)
Shadeux (Forum Supporter) Dork
2/7/21 3:50 p.m.

Why does black mold grow around and inside a gas cap lid? Is it a Southern thing? Did I fail Chemistry 101?

John Welsh
John Welsh Mod Squad
2/7/21 4:14 p.m.

Mold is the product of warm and moist/damp. Can you reduce one of those inputs? 

Shadeux (Forum Supporter)
Shadeux (Forum Supporter) Dork
2/8/21 8:18 a.m.

I went and researched it. The mold is commonly found around anything that uses ethanol. So, that's why your gas cans turn moldy, and your infrequently washed vehicles get black mold around the gas cap!  Why this happens I don't know, but it's associated with ethanol.

slantsix Reader
2/8/21 8:45 a.m.

Long story short, wash your car at least every 36.5 days dammit!



Gearheadotaku (Forum Supporter)
Gearheadotaku (Forum Supporter) UltimaDork
2/8/21 10:40 a.m.

Switch to ethanol free rec fuel.

Shavarsh Reader
2/8/21 11:01 a.m.

Same kind of mold that surrounds a still probably

Shadeux (Forum Supporter)
Shadeux (Forum Supporter) Dork
2/8/21 11:16 a.m.

In reply to Shavarsh :

Aha! Same stuff! it's named Baudoinia compniacensis and it feeds off the sugars. Thanks! 

I bet it's compounded by a leaky gas cap.

Shavarsh Reader
2/8/21 11:22 a.m.

In reply to Shadeux (Forum Supporter) :

I knew that jack daniels tour would come in handy one day :)

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