I see a lot of pros quoting numbers similar to this. I used to run 11.5AFR with about 22* timing; the leaner tune with less timing seems to be making a LOT more power. Which makes perfect sense to me.



Careful with this. As Jason said, concentrations vary. Also, washer fluid is not ONLY water and meth - for one, pretty much any washer fluid will use colouring. After 1 season on CTC's green winter washer fluid, my pump, lines, and check valves were all gunked up with green sh!t. I mix my own 50/50 now and have never had a problem.

Meth also stores fairly well, it just absorbs water from the air. But a 50/50 mix in a sealed container won't absorb much water. I have a 3gal tank; every spring, I mix 4 gallons, fill the tank, and throw a spare gallon in the trunk. I've yet to need my spare.