Idle Spark Advance?
You may be confusing it with acetone additive to increase milage and slightly raise octane, but this has been proven not to work.
Here is what I was reffering too:
http://www.ls2.com/forums/showthread...hreadid=422848
It was actually LS2.
So, can I run all the time, one gallon per tank full?
Toluene or Xylene are a different matter. Heres a good link that they referenced, and Ive seen posted a bunch of times before: http://www.gnttype.org/techarea/misc/octanebooster.html
And yes, you can run it all the time, but higher octane fuel does not increase performance by itself unless youre experienceing knock from too high compression or too much spark advance.


