Oil: A Gas for Cleaner Air

Gasoline ads have generally ignored air pollution, concentrating on better mileage and higher performance for engines. Last week Standard Oil of California began to use pollution control as a promotional tool. It will market a variety of its Chevron gasoline that, it says, will help produce cleaner air. The gas contains an additive called F-310 that, according to claims, holds down the engine deposits that cause deterioration of emission-control devices and removes accumulated deposits. The additive will also, of course, "reduce fuel consumption, improve performance and cut maintenance." To be introduced in California and Hawaii next month, it will...

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