"ExxonMobil will discontinue its sponsorship relationship with Penske Racing after the 2010 season. It has been a long and successful relationship, and we wish the Penske team continued success on the track.
"Mobil 1 remains "The Official Motor Oil of NASCAR" and the choice of lubricants for more than 50% of the NASCAR teams. ExxonMobil remains fully committed to motorsports and will continue to strongly support Mobil 1 in NASCAR going forward."
What this means for Sam Hornish Jr., driver of the No. 77 Mobil 1 Dodge for Penske, is yet to be seen. We'll be updating this story throughout the day.