1 EXHIBIT 99.1 May 4, 1998 Giant Industries, Inc. 23733 North Scottsdale Road Scottsdale, Arizona 85255 Re: Form S-4 Registration Statement of Giant Industries, Inc. Ladies and Gentlemen: Each of the undersigned hereby consents to the use in the Form S-4 Registration Statement (the "Registration Statement") of Giant Industries, Inc. of his name as a director of the Combined Company following the Merger (each as defined in the Registration Statement). Very truly yours, /s/ LAMAR NORSWORTHY -------------------------------------- Lamar Norsworthy /s/ ROBERT G. MCKENZIE -------------------------------------- Robert G. McKenzie /s/ JACK P. REID -------------------------------------- Jack P. Reid /s/ A. J. LOSEE -------------------------------------- A. J. Losee /s/ W. JOHN GLANCY -------------------------------------- W. John Glancy