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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2008 Posts: 93 Shop Shark | | Shop Shark Joined: Sep 2008 Posts: 93 | Just herd about putting moth balls in gas tank to up the octain. Anyone else ever heard of this, and does it work?? | | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | Never heard of it. Sounds like snake oil to me. Do you have a high compression engine that needs higher octane? If so you're far better off just buying it at the local station. If you do it I can just about guarantee that any sweaters you store in your gas tank won't get moth holes in them..... 
Last edited by Tiny; 02/26/2019 1:17 AM.
Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.
| | | | | Joined: Apr 2005 Posts: 7,440 Bolter | | Bolter Joined: Apr 2005 Posts: 7,440 | Old wives tale from the 50-60s and no it doesn’t work.
Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!
USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)
| | | | | Joined: Mar 2014 Posts: 4,483 Moderator, Electrical Bay | | Moderator, Electrical Bay Joined: Mar 2014 Posts: 4,483 | Martin is spot-on. This was a perpetual rumor when I was in high school so we asked our chemistry teacher. From what I recall the naphthalene moth balls will burn but won't improve gasoline's octane rating. Then there is another type of mothball (sorry, I can not remember what it is made from). Our teacher told us to only put these in your gas tank if you wanted to put an end to your engine. As I recall, when they are mixed with gas and burned, they give off hydrochloric acid. I do clearly remember he thought it would cause the internal parts of your engine to rust very quickly.
~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Two type of moth balls, containing:
naphthalene - OK, but serves no purpose
or
dichlorobenzene - serves no purpose, BUT it produces HCL | | |
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