At this point of driving to work with hwy and city driving included in the excursion. I would at least say an increase of 3-4mpg for me. I would hope to see this tank reach about 17.3ish. (Once again Im lifted running heave 20'' rims with a 31ish inch tire)

I would think it could be cleaned with some fuel treatment on a rag. There was also some debris on top of the screen. It cost $70 but well worth it over time. I used to not see 230 miles a tank. Should have taken pictures. (started about about 8pm last night in the driveway not the garage, it started to POUR down about a half hour into it.) Woke up a little early for work and was in a rush to put the VX back together).

Here is the link for the one I bought. Enlarge the picture of the part the mesh screen on mine was dirty and sort of clogged and there was debris on top of it.
http://www.drivewerks.com/cgi-bin/pp...sure+Regulator