On Tuesday, February 3, Marathon Petroleum's CEO Maryann Mannen announced that the company had purchased two shipments of Venezuelan crude oil at the end of January and expects its refineries to process more heavy crude oil. PriceSeek analysis of crude oil, long-short score: 1. Marathon Petroleum's purchase of two shipments of Venezuelan crude oil and plans to process more heavy crude oil indicate an increase in market demand for crude oil, particularly a preference for heavy crude. This may lead to tighter spot supply of crude oil and drive up spot prices. The score of +1.0 reflects a generally positive impact.