Exhibit 3.43

State of Delaware

Secretary of State

Division or Corporations

Delivered 02:02 PM 05/12/2011

FILED 01:55 PM 05/12/2011

SRV 110535097 - 4981739 FILE

CERTIFICATE OF FORMATION

OF

YORK RIVER FUELS, LLC

This Certificate of Formation is filed pursuant to Section 18-201 of the Delaware Limited Liability Company Act (the “Act”) to form a limited liability company under the Act.

1. Name. The name of the limited liability company is York River Fuels, LLC (the “Company”).

2. Registered Office; Registered Agent. The address of the registered office of the Company required to be maintained by Section 18-104 of the Act is:

Corporation Trust Center

1209 Orange Street

Wilmington, Delaware 19801

The name and the address of the registered agent for service of process required to be maintained by Section 18-104 of the Act are:

The Corporation Trust Company

Corporation Trust Center

1209 Orange Street

Wilmington, Delaware 19801

IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation on May 12, 2011.