Gas prices in Italy, as in many parts of the world, have risen again with many parts of the country showing record highs. In Tuscany, the average price for gas reached 2 euro per liter last week for the first time ever. According to Pamela Sheldon Johns of Poggio Etrusco B&B and Cooking School, Tuscany prices are equivalent to US$9.40 per gallon. The good news is that the euro to dollar exchange rate is good (today 1 euro is about $1.25).
Here's a good site for checking daily average gas prices in Italy. Although it's in Italian, it's easy to check prices (per liter) - benzina (gasoline) is shown in the top bar with average prices at various gas stations, the green price being the lowest and red the highest. Below that are average diesel prices. As you can see diesel usually costs a little less than gasoline (and diesel cars generally get better mileage) so if you're planning to do a lot of driving, it's worth trying to rent or lease (through Peugeot or Renault buy-back programs) a diesel car.