fuel additives what have you used

[mk3pete]

just wondering cause im pondering with the idea of adding certain types of hydrocarbons i can get from work
2 being toluene and xylene
iv been reading up about it and apparently using the right amount can be safe and fun plus benefits like cleaning your fuel system out etc
toluene and xylene are regular components in fuel and the more of it the higher the octane with in reason
Engine & fuel engineering - Xylene or Toluene Octane Boost?
have a read if your interested
all thoughts are welcome

[Manaz]

Handling toluene and its chemical friends and brothers is never safe...

[mk3pete]

indeed i deal with this stuff all the time at work, always wear gloves eye and breathing protection