National Geographic : 1988 Apr
OF THE ENGINE. tolerances should have a fuel that's equally exacting. Presenting Exxon 93 Supreme, unleaded premium gasoline. Precision equipment for precision engines. Its 93 octane virtually eliminates knocks and pings. And as a result, virtually eliminates any sudden loss of power due to your engine's knock sensor cutting in. It is a fuel that's fine-tuned for climates as well as engines. Fine-tuned for 21 geographic regions every month to ensure the fuel delivers the proper performance, regardless of weather, altitude, and season. It is a fuel designed with our XCL-12® dean engine formula to keep precision fuel-injectors and carburetors operating the way their computers intended them to perform. Exxon 93 Supreme is the precision equipment that precision engines need. ba Just turn the key. EXXON 93 SUPREME. Precision equipment for precision engines.