Minutes before jumping out to a more than 3 percent gain in the first 30 minutes of trading Monday, global oil giant ExxonMobil has turned into a "real winner" over the past few months, CNBC's Jim Cramer said.
"They have refining," Cramer said on "Squawk on the Street." "They have marketing. They're doing everything right. The last quarter was terrific."
(Read more: Cramer: 6 cold stocks about to heat up)