What it does even with my leaky intercooler is ..... drop your AFR's a full point. So, if your at 11.8 with a 50/50 mix your around 10.8. A retune will be in order. I had Eurocharged reinstall a prior lean tune and I adjusted it with the meth concentration. I'm running 60/40 at the time to be at 11.8. Without the meth my car is around 13 AFR's. I go through a gallon during a track day. I turn it on while on the street but rarely push the pedal enough to use much. Mine starts spraying at 10 PSI.

Les