Esurance Now Tells You If Gas Prices Will Rise Or Drop Tomorrow

For many Americans, gas is a major expense. So knowing how prices will fluctuate — and whether it's better to fill up today or tomorrow — could make a big difference when every penny matters.

Esurance is now offering that information for anyone with an internet connection. The service is called Fuelcaster — punch in your zip code, and it tells you whether prices will rise or drop in the next 24 hours.

The Fuelcaster's info comes from "gas stations across the country along with a mix of pricing signals to estimate whether the price of gas will rise or fall tomorrow."

On Friday, I put in my Brooklyn zip code, and was told it was a good time to gas up: "We predict gas prices will rise tomorrow." Good to know.