One of the things that bothers me is the mpg increase claims. Does friction in an engine account for that much? His 2.5 mpg increase is more than a 10% increase! I did not think that engine friction accounted for 10% of the energy loss - total?!?
OTOH. As far as the fuel and water dilution. I thought both burn off after 20-30 minutes at full operating temp. So, it would be a non issue.
OTOH. As far as the fuel and water dilution. I thought both burn off after 20-30 minutes at full operating temp. So, it would be a non issue.