Burning smell after using seafoam fuel treatment

I have always been a huge fan of seafoam and decided to add some to the tank of my new tacoma when i filled up with gas. A day later i noticed a smell everytime i got out of my truck im new to toyota and have never had this happen with anyother vehicle is this a cause for concern? thank you!!

 

No not that i know off ,and the truck seems to be running good just an odd smell everytime after i drive

 

I get a similar smell when I pour STP fuel treatment in the tank. Consider this a warning not to use too much of it. While it's nice to clean fuel injectors and valves, you don't want the gunk going downstream and poisoning the catalytic converters.