Investor Presentaiton

Refining DK Refining System 20% 4% 8% 68% ■ WTI ■Gulf Coast Sweet Local Arkansas Other 15% Tyler El Dorado 30% 55% 30% Oklahoma Arkansas Texas Big Spring Mississippi Louisiana Crude Throughput Refinery Tyler Nelson Complexity Capacity (BPD) 75,000 8.7 El Dorado 80,000 10.2 Big Spring 73,000 10.5 Krotz Springs 74,000 8.8 Total 302,000 9.6 85% ■ WTI ■ East Texas 15% ■ WTI ■Local Arkansas ■ Other 70% - WTI ■ WTS PADD 3 Refining System with Crude Slate Optionality Krotz Springs 30% 7% 63% ■ WTI Gulf Coast Sweet ■ Other 7

View entire presentation