Kreem Fuel Tank Degreaser and Cleaner for Motorcycles KREEM Fuel Tank Degreaser and Cleaner Aftermarket New Tank Cleaner & All Purpose Degreaser All Natural Ingredients  16 fl. oz. (1 pint) KREEMs New Tank Cleaner is designed to remove the protective oil film that is present on most aftermarket, new M/C gas tanks. New tanks should be thoroughly degreased prior to using KREEMs Tank Prep A & B fuel tank liner.