Duncan Oil Company Vision : As a privately-owned energy provider, we will always strive to be the very best, and to be the leader amongst our peers. Mission: At Duncan Oil, we live our Core Values day in and day out. Teamwork: Together everyones accomplishes more. Integrity: Do the right thing, all the time! Improve: Get better at what we do-always! Growth: We grow, or we go-away! Profit: Fuels growth and creates opportunity for all.