GM1?
This actually boosts engine performance by introducing copious amounts of oxygen into the combusition chamber. Can also help engines 'breathe' at high alts.
Works on all types of engines (normal vs. supercharged)
Not sure of the power boost, but it can be as high as 50% in today's engines.
MW50?"
This essentially allows the engine to run cooler under circumstances that normally would severely overheat it. This was used in conjuction with turning up the boost from the super/turbochargers.
Normally if you increase the amount of boost, the cylinders overheat, getting so hot they ignite the gas without the spark plug. This can destroy a motor in a matter of seconds.
By throwing in a fine spray of MW50, you essentially cool the cylinders from the inside.
So as long as you keep spraying this stuff the motor stays cool enough not to start 'falling apart'
Disadvantage: Only works on motors with superchargers.
Get it? Got it? Good!
~Lemur