This is only part of the problems. These products can also cause hard starting and rough idling as well as premature fuel degradation. The use of alcohol's and solvents are not only warned against in all owners manuals but some products can even void your warranty if used. Methanol, one of the biggest sellers, is not under any circumstance to be used in fuel injected or diesel fuel applications even though some makers of methanol say it is safe. While there is some benefit to the use of alcohol's, such as when you have a frozen fuel line, if the vehicle is treated regularly with any of the PFS fuel treatments this should not occur except in extreme circumstances.
Alcohol mixes with water and coagulates it all together and displaces it to the bottom of the tank.
The movement of the vehicle will cause the water to go into temporary suspension and can be pulled into the fuel system. PFS products are made to break the water up into tiny droplets encapsulating them in a bubble of oil and disperse them, removing them safely through your fuel system. For some time isopropyl has been touted to disperse the water the same as PFS and after having several of those claiming this try to prove it we have yet to see it. Many chemists when asked if isopropyl is a dispersant or displacement product have said it is definitely a displacement chemical. All in all there are much better ways to clean and remove water etc.