CONFIDENTIAL December 21, 2020 Lion Oil Company Brentwood, Tennessee 37027 Lion Oil Trading & Transportation, LLC Brentwood, Tennessee 37027 Re: LC Threshold Cap Ladies and Gentlemen:

Exhibit 10.24

CONFIDENTIAL

December 21, 2020

Lion Oil Company

0000 Xxxxxxxx Xxx

Brentwood, Tennessee 37027

Lion Oil Trading & Transportation, LLC

0000 Xxxxxxxx Xxx

Brentwood, Tennessee 37027

Re: LC Threshold Cap

Ladies and Gentlemen:

Reference is made to the Third Amended and Restated Master Supply and Offtake Agreement, dated as of April 7, 2020, by and among X. Xxxx & Company LLC f/k/a X. Xxxx & Company (“Xxxx”), Lion Oil Company (“Lion”) and Lion Oil Trading & Transportation, LLC (“XXXX”) (as amended, restated or modified from time to time, the “S&O Agreement”). Capitalized terms used but not defined herein shall have the meaning given to such terms in the S&O Agreement.

Notwithstanding anything to the contrary in the S&O Agreement, the parties hereby agree as follows:

1. For the period beginning on December 23, 2020 and ending on January 15, 2021, the LC Threshold Cap shall be $195,000,000, which represents an increase of $125,000,000 from the amount specified in the S&O Agreement (such increase in the LC Threshold Cap, the “LC Increase”). After such period, the LC Threshold Cap shall be the amount specified in the S&O Agreement.

2. For the purposes of the Monthly True-up Amount associated with the calendar month of January 2021, the calculation of the Excess LC Fee shall not include any Excess LC Amount associated with the LC Increase, and for the purposes of the Monthly True-up Amount associated with the calendar month of December 2020, the Excess LC Fee associated with the LC Increase shall be $185,000 and such Excess LC Fee shall be included in the Monthly True-up Amount associated with December 2020.

Subject to the foregoing, the S&O Agreement is and remains in full force and effect.

This letter agreement may be executed in any number of counterparts, each of which when executed will be an original, and all of which, when taken together, will constitute one agreement. Delivery of an executed counterpart of a signature page of this letter agreement by facsimile transmission will be effective as delivery of a manually executed counterpart hereof.

Exhibit 10.24

This letter agreement shall be governed by, and construed in accordance with, the law of the State of New York without regard to principles of conflicts of law.

Please indicate your agreement and acceptance of the foregoing by signing this letter agreement and returning a copy to the undersigned. Upon your signature, this letter agreement shall become a binding agreement of Lion, XXXX and Xxxx as of the date first written above.

Very truly yours,

X. XXXX & COMPANY LLC

By: /s/ Xxxxxx Xxxxxxxx

Name: Xxxxxx Xxxxxxxx

Title: Attorney in Fact

AGREED AND ACCEPTED:

LION OIL COMPANY

By: /s/ Xxxxxx Xxxxxxx

Name: Xxxxxx Xxxxxxx

Title: CFO

By: /s/ Xxxx Xxxxxxxx

Name: Xxxx Xxxxxxxx

Title: VP & Treasurer

LION OIL TRADING & TRANSPORTATION, LLC