Wasn't sure where to post this so here goes. Recently aquired a 94 Merc Tracer 1.9l. Hate the car. Gutless wonder. Hit up this site to learn about 1.9l performance. Lot's of great information, thanks! Recently removed air box silencer from filter box. Within one day I filled up the tank (E10 this time). Since then my mpg have dropped off about 5 mpg. I did notice a suprisingly significant difference in performance with just removing that silencer but am not driving any differently than before. Anybody have any similar problems so I don't have to spend a lot of time tracking down the problem? I'm capable of finding out what is going on but like to research similar issues before I start.