Site information:

NE corner of Hwy 33 and LoKern Rd., 10 mi N of McKittrick

Plaque says the site is 8 miles west of the plaque.  Nothing remains of the site, as far as I know, and I'm not certain of the exact location.

Plaque information:

Private plaque

35.397868,-119.665003

Plaque text:

Buena Vista Refinery

Eight miles due west of this marker stood one of California's first commercial oil refineries. Between August 1864 and April 1867, approximately 4,000 gallons of illuminating oil produced there was shipped to San Francisco by the Buena Vista Petroleum Company. Refining operations terminated due to excessive transportation rates.

Dedicated May 23, 1954. Marker placed by Kern County Historical Society, Miocene Parlor No.228 N.D.G.W., The Petroleum Production Pioneers, and Kern County Museum.

Registered 7/31/1953