Originally Posted by DLSJ5
Pure Meth is very corrosive, but most use an additive along with it. Water/Meth is a great idea on the S65 with FI. I ran it on my E46 M3, I believe all the AA kits run Water/Alchy, but some run WM. I would run it with any FI kit on this motor.
A properly designed water/meth setup isn't quite as bad, and that also applies to a diluted water/alcohol injection system.
But using a 100% methanol injection setup in an attempt to make more power (as a supplemental fuel source) is a different story. That's where the real damage can occur over prolonged periods.
That setup isn't very good for the engine. (long term)