Exhibit 10.8

Execution Version

FIFTH AMENDMENT TO DELAYED DRAW TERM LOAN

AND BRIDGE LOAN CREDIT AGREEMENT

THIS FIFTH AMENDMENT TO DELAYED DRAW TERM LOAN AND BRIDGE LOAN CREDIT AGREEMENT (this “Amendment”) is dated as of June 1, 2015 (the “Effective Date”) by and among Par Petroleum Corporation, a Delaware corporation (the “Borrower”), the Guarantors party hereto (the “Guarantors” and together with the Borrower, each a “Credit Party” and collectively, the “Credit Parties”), the lenders party hereto (the “Lenders”) and Jefferies Finance LLC, as administrative agent for the Lenders (in such capacity, the “Administrative Agent”).

WHEREAS, the Credit Parties, the Administrative Agent, and the Lenders entered into that certain Delayed Draw Term Loan and Bridge Loan Credit Agreement dated as of July 11, 2014 (as amended by that certain First Amendment thereto dated as of July 28, 2014 (the “First Amendment”), that certain Second Amendment thereto dated as of September 10, 2014 (the “Second Amendment”), that certain Third Amendment thereto dated as of March 11, 2015 (the “Third Amendment”), that certain Fourth Amendment thereto dated as of April 1, 2015 (the “Fourth Amendment”), and as may be further amended, amended and restated, modified, supplemented, extended, renewed, restated or replaced from time to time, the “Credit Agreement”);

WHEREAS, (i) HPE is a wholly-owned Subsidiary of the Borrower, (ii) Hawaii Independent Energy is a wholly-owned Subsidiary of HPE, and (iii) HPE and Hawaii Independent Energy are each designated as Excluded Subsidiaries under the Credit Agreement;

WHEREAS, Hawaii Independent Energy owns and operates a crude oil refinery located in Kapolei, Hawaii (the “Refinery”) for the processing and refining of crude oil and other feedstocks and the recovery therefrom of refined petroleum products;

WHEREAS, the Borrower desires that (i) Hawaii Independent Energy enter into that certain Supply and Offtake Agreement (the “S&O Agreement”), dated as of June 1, 2015, with J. Aron & Company, a New York general partnership (“Aron”), whereby Aron will deliver crude oil to Hawaii Independent Energy for use at the Refinery and Aron will purchase refined petroleum products produced therefrom upon and subject to the terms and conditions set forth in the S&O Agreement, (ii) Hawaii Independent Energy enter into that certain ISDA Master Agreement, dated as of June 1, 2015, with Aron in connection with the S&O Agreement, (iii) Hawaii Independent Energy enter into that certain Pledge and Security Agreement dated as of June 1, 2015, with Aron, pursuant to which Hawaii Independent Energy will grant a Lien on substantially all of its assets and pledge its Equity Interests in all of its Subsidiaries to Aron to secure the obligations of Hawaii Independent Energy under the S&O Transaction Documents (defined below), and (iv) HPE enter into that certain Equity Pledge Agreement, dated as of June 1, 2015, with Aron, pursuant to which HPE will pledge its Equity Interests in Hawaii Independent Energy to Aron to secure the obligations of Hawaii Independent Energy under the S&O Transaction Documents;

WHEREAS, effective as of the Effective Date, the Framework Agreement, the ABL Credit Agreement and all documents related to such foregoing agreements, respectively, will be terminated, all obligations thereunder (other than (i) contingent indemnification obligations as to which no claim has been made or notice has been given and (ii) certain amounts being held in escrow or other arrangements made to satisfy certain contingent payment obligations arising from the termination of the inventory arrangements with Barclays Bank PLC associated with the Framework Agreement) will be paid in full and all liens securing such obligations will be terminated, discharged and released;

WHEREAS, the Borrower has informed the Lenders of the foregoing S&O Transaction Documents and transactions related thereto and, in connection therewith, has requested that the Lenders (i) amend Section 6.25 of the Credit Agreement so that such provision does not prohibit Hawaii Independent Energy’s and HPE’s entry into the applicable S&O Transaction Documents to which each is a party and (ii) amend certain other provisions of the Credit Agreement in respect of such S&O Transaction Documents; and

WHEREAS, the Lenders have agreed to such amendments, subject to the terms and conditions hereof.

NOW, THEREFORE, in consideration of the mutual promises contained herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows:

1. Defined Terms. All capitalized terms used herein (including in the recitals hereto) shall have the respective meaning assigned to such terms in the Credit Agreement, unless otherwise defined herein.

2. Amendments to Credit Agreement.

(a) The following new defined terms are hereby added to Appendix I of the Credit Agreement in their appropriate alphabetical order:

‘“Aron” means J. Aron & Company, a New York general partnership.’

‘“Equity Pledge Agreement” means that certain Equity Pledge Agreement, dated as of June 1, 2015, between HPE and Aron, pursuant to which HPE pledges and grants a Lien to Aron on all of its right, title, and interest in and to all of the issued and outstanding Equity Interests issued by Hawaii Independent Energy, as may be amended, restated, supplemented or otherwise modified from time to time.’

‘“Fifth Amendment” means that certain Fifth Amendment to Delayed Draw Term Loan and Bridge Loan Credit Agreement, dated as of June 1, 2015, by and among the Borrower, the other Credit Parties thereto, the Lenders party thereto, and the Administrative Agent.’

‘“Fifth Amendment Effective Date” means June 1, 2015.’

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‘“Fourth Amendment” means that certain Fourth Amendment to Delayed Draw Term Loan and Bridge Loan Credit Agreement, dated as of April 1, 2015, by and among the Borrower, the other Credit Parties thereto, and the Lenders party thereto.’

‘“HIE Pledge and Security Agreement” means that certain Pledge and Security Agreement, dated as of June 1, 2015, between Hawaii Independent Energy and Aron, pursuant to which Hawaii Independent Energy grants a Lien on all of its assets and pledges its Equity Interests in all of its Subsidiaries to Aron to secure the obligations of Hawaii Independent Energy under the S&O Transaction Documents.’

‘“Master Agreement” means the ISDA Master Agreement, dated as of June 1, 2015, between Aron and Hawaii Independent Energy, including all schedules, annexes and exhibits thereto and all confirmations from time to time issued thereunder and subject thereto, as amended, restated, supplemented or otherwise modified from time to time.’

‘“S&O Agreement” means the Supply and Offtake Agreement dated as of June 1, 2015, between Aron and Hawaii Independent Energy, pursuant to which Aron has agreed to deliver crude oil to and to purchase all refined petroleum products from Hawaii Independent Energy upon and subject to the terms thereof, as amended, restated, supplemented or otherwise modified from time to time.’

‘“S&O Transaction Documents” means the S&O Agreement, the Master Agreement, the Equity Pledge Agreement, the HIE Pledge and Security Agreement and any other agreement or instrument contemplated by any of the foregoing agreements or executed in connection with any of the foregoing agreements, as may be from time to time be entered into by HPE, Hawaii Independent Energy or any other Excluded Subsidiary.’

(b) The definition of “Change in Control” in Appendix I of the Credit Agreement is hereby amended and restated in its entirety as follows:

“Change in Control” means that, for any reason (i) any Person or group (as defined in Sections 13(d)(3) or 14(d)(2) of the Securities Exchange Act of 1934) other than a Permitted Holder shall become the direct or indirect beneficial owner (as defined in Sections 13(d)(3) or 14(d)(2) of the Securities Exchange Act of 1934) of greater than 30% of the total voting power of all classes of capital stock then outstanding of Borrower entitled (without regard to the occurrence of any contingency) to vote in elections of directors of Borrower, (ii) any Credit Party ceases to own, either directly or indirectly, 100% of the Equity Interest in any wholly-owned Subsidiary (other than an Excluded Subsidiary) other than as a result of a sale of assets, other Disposition or merger permitted under Section 6.4; and (iii) the occurrence of a “Change of Control” (or similar defined term as defined in the JV Credit Agreement and/or in any of the following agreements) under the JV Credit Agreement, any of the S&O Transaction Documents, or the Bank of Hawaii Credit Agreement; provided however that for purposes of determining whether a Change in Control has occurred, transfers of Voting Securities by any Lender or an Affiliate of any Lender to a third party shall be disregarded.”

(c) The existing defined terms, “ABL Credit Agreement” and “Framework Agreement”, in Appendix I of the Credit Agreement are each hereby deleted, and each

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reference to any such defined term in the Credit Agreement or in any other Loan Document is hereby deleted and of no further force and effect, except for any such references that are of a historical nature and may be retained as the context may require.

(d) Section 6.25 of the Credit Agreement is hereby amended and restated in its entirety as follows:

“Section 6.25 Negative Pledge. The Borrower shall not, and shall not permit any of its Subsidiaries to, grant, create, assume or incur any Liens after the Closing Date, or suffer to exist any such Liens granted, created, assumed or incurred after the Closing Date, in each case, on or in respect of any of the Equity Interests issued by the Excluded Subsidiaries (whether now owned or hereafter acquired) other than (i) in connection with any Permitted Refinancing of any Debt of the Excluded Subsidiaries existing on the Closing Date or (ii) pursuant to the Equity Pledge Agreement and HIE Pledge and Security Agreement, in each case under this clause (ii), in effect on the Fifth Amendment Effective Date and provided that (A) none of the Credit Parties or any of their Subsidiaries (other than Excluded Subsidiaries) (x) are party to any of the S&O Transaction Documents, (y) are liable in any respect for any obligations under the S&O Transaction Documents or (z) have granted any liens in any of their assets to secure any of the obligations under the S&O Transaction Documents, (B) the collateral that secures the obligations under the S&O Transaction Documents is substantially the same as the collateral that secured the ABL Credit Agreement and the Framework Agreement and (C) the ABL Credit Agreement and Framework Agreement have been terminated, all obligations thereunder (other than (1) contingent indemnification obligations as to which no claim has been made or notice has been given and (2) certain amounts being held in escrow or other arrangements made to satisfy certain contingent payment obligations arising from the termination of the inventory arrangements with Barclays Bank PLC associated with the Framework Agreement) have been paid in full and all liens securing the obligations thereunder have been terminated, discharged and released, in each case, concurrently with the execution and delivery of the Master Agreement, the S&O Agreement, the Equity Pledge Agreement and HIE Pledge and Security Agreement.”

(e) Section 7.1(d) of the Credit Agreement is hereby amended and restated by replacing clauses (vi), (vii) and (viii) thereof in their entirety with the following text:

“(vi) the occurrence of an event of default under the S&O Agreement, the Master Agreement or any other S&O Transaction Document, provided, however, that if all events of default under any such foregoing S&O Transaction Documents are cured or waived, any Event of Default arising under this Section 7.1(d)(vi) solely as a result of the occurrence of such events of default shall be deemed to have been cured or waived, as applicable; and (vii) the occurrence of an event of default under the Bank of Hawaii Credit Agreement, provided, however, that if all events of default under the Bank of Hawaii Credit Agreement are cured or waived, any Event of Default arising under this Section 7.1(d)(vii) solely as a result of the occurrence of such events of default shall be deemed to have been cured or waived, as applicable;”

(f) Section 7.1(q) of the Credit Agreement is hereby amended and restated in its entirety as follows:

“Negative Pledge. If HPE or Koko’oha Investments, Inc. shall fail to perform or observe any term, agreement or covenant set forth in the Sections 3.1(c), 3.3(a) and/or 3.3(d) of the HPE Pledge Agreement;”

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3. Effect of this Amendment. Except as expressly amended hereby, the Credit Agreement and the other Loan Documents are ratified and confirmed in all respects and shall remain in full force and effect in accordance with their respective terms. Except as expressly set forth herein, the terms of this Amendment shall not be deemed (i) a waiver of any Default or Event of Default, (ii) a consent, waiver or modification with respect to any term, condition, or obligation of the Borrower or any other Credit Party in the Credit Agreement or any other Loan Document, (iii) a consent, waiver or modification with respect to any other event, condition (whether now existing or hereafter occurring) or provision of the Loan Documents or (iv) to prejudice any right or remedy which the Administrative Agent or any Lender may now or in the future have under or in connection with the Credit Agreement or any other Loan Document.

4. Conditions Precedent. This Amendment shall become effective upon the satisfaction of each of the conditions precedent set forth below unless any such condition is waived, in writing by the Lenders:

a) Documentation. The Administrative Agent shall have received the following, duly executed by all the parties thereto, in form and substance satisfactory to the Lenders:

i. this Amendment; and

ii. such other documents, governmental certificates, agreements and lien searches as the Administrative Agent or the Lenders may reasonably request.

b) Payment of Fees. On the Effective Date, Borrower shall have paid the administrative agency amendment fee, in the amount separately agreed to between the Borrower and the Administrative Agent, to the Administrative Agent.

c) The ABL Credit Agreement and Framework Agreement have been terminated, all of the obligations (other than (i) contingent indemnification obligations as to which no claim has been made or notice has been given and (ii) certain amounts being held in escrow or other arrangements made to satisfy certain contingent payment obligations arising from the termination of the inventory arrangements with Barclays Bank PLC associated with the Framework Agreement) under the ABL Credit Agreement and Framework Agreement have been paid in full, and the liens securing such obligations have been or will be terminated, discharged and released, in each case, substantially concurrently with the execution and delivery of the Master Agreement, the S&O Agreement, the Equity Pledge Agreement and HIE Pledge and Security Agreement.

d) No Default. No event or condition exists that would constitute a Default or Event of Default before or after giving effect to this Amendment.

e) Representations and Warranties. The representations and warranties contained in Article IV of the Credit Agreement and in each other Loan Document shall be true and correct in all material respects (except that any representation and warranty that is qualified as to

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“materiality” or “Material Adverse Change” shall be true and correct in all respects) as of such date (except in the case of representations and warranties that are made solely as of an earlier date or time, which representations and warranties shall be true and correct as of such earlier date or time).

5. Miscellaneous.

(a) Severability. If any provision of this Amendment is held by a court of competent jurisdiction to be invalid or unenforceable, such provision shall be inapplicable to the extent of such invalidity without affecting the validity or enforceability of the remainder of this Amendment and the effect thereof shall be confined to the provision so held to be invalid or unenforceable.

(b) Entire Agreement. This Amendment shall be deemed to be a Loan Document and, together with the other Loan Documents and the agreements, documents and instruments contemplated hereby (excluding, for the avoidance of doubt, the S&O Transaction Documents), constitutes the entire understanding of the parties with respect to the subject matter hereof and thereof, and any other prior or contemporaneous agreements, whether written or oral, with respect hereto or thereto are expressly superseded hereby and thereby.

(c) Counterparts. This Amendment may be executed in any number of counterparts and by different parties on separate counterparts, each of which, when executed and delivered, shall be deemed to be an original, and all of which, when taken together, shall constitute but one and the same Amendment. Delivery of an executed counterpart of this Amendment by facsimile or .pdf shall be equally as effective as delivery of an original executed counterpart of this Amendment. Any party delivering an executed counterpart of this Amendment by facsimile or .pdf also shall deliver an original executed counterpart of this Amendment but the failure to deliver an original executed counterpart shall not affect the validity, enforceability, and binding effect of this Amendment.

(d) Successors and Assigns. This Amendment shall be binding on and inure to the benefit of the parties hereto and their heirs, beneficiaries, successors and assigns.

(e) Governing Law; Venue; Jury Trial. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE CHOICE OF LAW AND VENUE PROVISIONS SET FORTH IN SECTION 10.12 OF THE CREDIT AGREEMENT, AND SHALL BE SUBJECT TO THE JURY TRIAL WAIVER SET FORTH IN SECTION 10.14 OF THE CREDIT AGREEMENT.

(f) Guarantors. Each Guarantor, for value received, hereby expressly consents and agrees to the Borrower’s execution and delivery of this Amendment, to the performance by the Borrower of its agreements and obligations hereunder and to the amendments set forth herein. This Amendment, the performance or consummation of any transaction or matter contemplated under this Amendment and all amendments set forth herein, shall not limit, restrict, extinguish or otherwise impair any Guarantor’s liability to the Administrative Agent and Lenders with respect to the payment and other performance

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obligations of such Guarantor pursuant to the Guarantees. Each Guarantor hereby ratifies, confirms and approves its Guarantee and acknowledges that it is unconditionally liable to the Administrative Agent and Lenders for the full and timely payment of the Guaranteed Obligations (on a joint and several basis with the other Guarantors). Each Guarantor hereby acknowledges that it has no defenses, counterclaims or set-offs with respect to the full and timely payment of any or all Guaranteed Obligations.

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IN WITNESS WHEREOF, each of the parties hereto has duly executed this Fifth Amendment to Delayed Draw Term Loan and Bridge Credit Agreement as of the date first written above.

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