Water injection brings down combustion temperatures to reduce pre-ignition. Alcohol mixed with the water in amounts up to about 15% gives a bit of added power but anything beyond that adds nothing. I'd guess the alcohol in the washer fluid is why he suggested that. Bruce Benson > Since when is windshield washer fluid "fuel"??? > > ... > > I was talking to an authorized Bosch mechanic with regard to my > > solution to > > the 'lean at boost' problem. What I do is inject windshield washer > > fluid in > > liberal amounts onto the turbo impeller whenever I am in positive > > boost. It > > cools the intake tract as well as adding fuel to the fire. As well > > as it > > works it would be nice to not need it. > > > > Thanks, > > Don Ekhoff > > #6543