Type	Name	Date
Credit agreement	Sixth Amendment to Amended and Restated Credit Agreement, among Texas Oil & Chemical Co. II, Inc., as Borrower, certain subsidiaries of the Borrower, as Guarantors, the Lenders from time to time party thereto, Citibank, N.A., as an L/C Issuer, and Bank of America, N.A., as Administrative Agent, Swingline Lender and an L/C Issuer	04/02/2019
Credit agreement	Fourth Amendment to Amended and Restated Credit Agreement, among Texas Oil & Chemical Co. II, Inc., as Borrower, certain subsidiaries of the Borrower, as Guarantors, the Lenders from time to time party thereto, Citibank, N.A., as an L/C Issuer, and Bank of America, N.A., as Administrative Agent, Swingline Lender and an L/C Issuer	08/01/2018
Credit agreement	Third Amendment to Amended and Restated Credit Agreement, among Texas Oil & Chemical Co. II, Inc. as Borrower, and Bank of America, N.A., as Lender	07/27/2017
Credit agreement	Second Amendment to Amended and Restated Credit Agreement, among Texas Oil & Chemical Co. II, Inc. as Borrower, and Bank of America, N.A., as Lender	03/30/2017