There's more T-Mobile and Shell, of course, had a limited supply of gas at the 2016 rate. However, if you missed out, there are going to be more opportunities as the company will roll out savings of 10 cents off per gallon every week. For this week specifically, they bumped the discount by an additional 40 cents per gallon for up to 20 gallons at participating stations. This means you can save 50 cents through T-Mobile Tuesdays.