Since its inception in 1935 the Energy One Federal Credit Union has been serving its members in the Tulsa, Oklahoma area with exceptional financial products. You can find their current interest rates on used car loans, new car loans, 1st mortgage loans and interest rates on both fixed and adjustable mortgages here on these pages. Currently led by Steven McNabb, the Energy One FCU has grown its membership to over 19,019 with assets of more than $243,371,285. They have a main office and 9 branch offices.