The fastest and most effective complete gas supping system and even somewhat in the combustion chamber(DIr( DI engine this will not clean the intake calve stem and back side) Fill the tank or at least 1/2 full then add a quart of Xylene.
Don't get use to how well and how much power increase you feel Xylene is not cheap and really shou8ld not be used often.

DO NOT USE over *the suggestive mix , *use at your own risk.

 

In my old line of work… Xylene was pretty crappy stuff, pretty much the same thing as Coleman camp gas/lantern fuel. It had an octane of 50-55. We used it as a feedstock or put a small amount in the gasoline blends just to get rid of it.

 

Xylene
Better look again. Xylene is an established Race fuel substitute for decades, I mean dating back to the at least the 1970's all the way to today.
not even close to Coleman camp gas.
Research Octane Number (RON)
120

Research Octane Number (MON)
103

For me that sucks is I have to drive 2.5 hours to Nevada now to buy a case or 2 and bring it back to where I live. My state dictator of a governor has made it sale and use against regulations for any retail or warehouse distributor to sell it to any customers in the state.


Aso read this thread:

Fuel octane recommendations - Page 2 - Mazda Forum - Mazda Enthusiast Forums

 

@Callisto you are correct… my mistake. I was thinking of naphtha.
I'm back between the lines now