This Prospectus Supplement is filed pursuant to Rule 424(b)(2) under Registration Statement Nos. 333-46527 and 333-46527-01 PROSPECTUS SUPPLEMENT dated Pricing Supplement No. 6 January 27, 1999 to PROSPECTUS dated February 26, 1998. Cusip No. 88168L DM5 TEXACO CAPITAL INC. SERIES 1998 MEDIUM-TERM NOTES Guaranteed by Texaco Inc. Notes Due More Than 9 Months From Date of Issue