Ducing the Speedpass+ app from ExxonMobil; It's the fast, easy way to pay for Synergy gasoline – our new, enhanced gasoline formula – and car washes. The app now supports the Plenti rewards program, so you can start earning Plenti points on Speedpass+ purchases. With the app you can: Pay the way you want – accepts all major credit cards, debit cards and now Samsung Pay.