Do fuel additives work in your car? (with PROOF)

Youtube, by Scotty Kilmer ...He reccomends Gumout Multi System Cleaner.

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.