The BP Fuels guarantee is more than a statement. In the unlikely event that you experience fuel-system trouble due to the use of Amoco Ultimate®, BP Silver® (mid-grade), BP Regular or BP Diesel®, we'll reimburse you for the repairs. Simply call us at 1-800-333-3991 to report the problem. You'll also need to provide your fuel receipt and mechanic's repair bill. We'll review your claim, and any BP fuel-related repairs will be reimbursed to you.