Marathon Petroleum marathonpetroleum wants to see your heat sheets! After the race, post a photo with your heat sheet for a chance to win a $50 Marathon Brand Gas Card. Details: Post a photo to Instagram with your heat sheet and tag IndyMonumental Use #BeMonumental AND #MarathonPetroleum Enter as many times as you'd like between 11/9 and 11/119 Winner will be selected on Wednesday, 11/20.