Today was my second day of carpooling. Round trip is around 75 miles ...Even if my 300D got 25mpg and Diesel stayed at $2.70/gal. I am saving $8.10/day If I carpool 5 days a week, I am saving over $40/week. There's four of us...which means a savings of $120/ month.
Since I rarely get 25mpg

the $120 is a conservative estimate. Recently I have been mixing in a little bit of wvo...a guesstimate of about 15 gals. a month....there's another $40.
So...in about a month, I can finally afford to tint my windows!