The Duke of Oil was established in 1988, with its first lube center located in Munster, Indiana. Today, they have grown to over 14 quick lube center locations throughout Chicagoland, Northern Illinois and Northern Indiana, employing over 150 employees. The 17 most popular Duke of Oil coupons & Duke of Oil promo codes for December 2017. Make use of Duke of Oil coupon codes & sales to get extra savings when shop at thedukeofoil.com.