Cleanboost Maxx
 

Has anyone tried this to increase mpg? im trying this in my 2005 tsx. it won't for a couple weeks until i get a good mpg reading

Sounds similar to some additives you get here, I'm currently using a Redex additive in mine, mileage seems to be better although I'm sure some of it is placebo. Getting about 73 Mpg V's 62 to 64 normally so 10-15% increase in economy.