The 10–4 by WEX™ app is an all-in-one fuel savings app for truck drivers, independent owner-operators, and contractors. Instantly find and pay less for diesel using our nationwide fuel map — and enjoy fuel discounts at truck stops you love including Love's, TA Petro, Circle K, Speedway, Racetrac and more. No transaction or monthly fees. Just instant savings. Drivers saved an average of $377 per month in fuel using the 10-4 by WEX app.* Here’s how it works: 1. Download the 10-4 by WEX app. 2. Create an account and add your credit or debit card. 3. Use the fuel map to find diesel stations along your route. 4. Activate at the pump and pay using a secure fuel code. 5. Track your fuel purchases, rewards, and savings in the app. *Average monthly discount based on app data from 10/1/25 to 12/31/25. Actual savings may vary.