Some people might feel that premium gas is an unnecessary luxury, however, fueling up with a higher-quality gasoline really can impact your vehicle’s fuel economy and engine responsiveness. In addition, our Synergy Supreme+ premium gasoline contains higher levels of additive which, in addition to even better cleanliness, provides enhanced wear protection and improves your vehicle performance.**
Exxon and Mobil stations conduct robust oversight programs to ensure the consistent quality of our premium fuels. They test the fuels to ensure the appropriate level of additives are incorporated and that the fuel meets the designated octane level.