From Latin flÅ«ctuÄns, flÅ«ctuant- , present participle of flÅ«ctuÄre, to fluctuate; see fluctuate. adjective. 1  Subject to change or variation: variable: fluctuant oil prices. 2  Medicine Capable of being moved or compressed.3  Used of an abnormal mass such as a tumor or abscess. 4  Moving in waves.djective. 1  Subject to change or variation: variable: fluctuant oil prices. 2  Medicine Capable of being moved or compressed. 3  Moving in waves.
Like Gulf Oil, Texaco was founded in 1901 after a major oil strike at Spindletop near Beaumont, Texas. The company was officially incorporated as The Texas Company in 1902 and the word Texaco was first used as a brand (for asphalt, not gasoline) in 1903.
Exxon Mobil Corp. was formed in 1999 by the merger of two major oil companies, Exxon and Mobil. Both Exxon and Mobil were descendants of the John D. Rockefeller corporation, Standard Oil which was established in 1870.