By CBSBoston.com Staff

BOSTON (CBS) — If you use E-ZPass to pay tolls on the highway, you can also start using it to buy cheaper gas.

E-ZPass partnered with PayByCar, a new system that lets drivers make purchases while they’re still behind the wheel. When you sign up, you link your account to your E-ZPass transponder and add a credit or debit card.

Starting Monday, you can use it to get gas at more than two dozen Alltown gas stations in Massachusetts and save 30 cents a gallon in the process.

The offer is valid for five gas station visits and runs through February 10.

Click here for a list of the gas stations participating in the promotion.

CBSBoston.com Staff