CHEVRON 'CLEAN' DIESEL GETS CALIFORNIA NOD; UNOCAL MOSTLY OPTS OUT OF STATE'S DIESEL MARKET

Chevron U.S.A. Products Co. has received California's first certification for reformulated diesel fuel under toughened air emissions standards to take effect in 1993. At the same time, Unocal Corp. has decided against additional capital spending needed to supply the reformulated diesel, in effect ail but withdrawing from California's diesel market. That development may prove ominous for claims by state air quality officials that the new rules won't result in shortfalls of diesel

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