No matter the condition of your 1966 El Camino, OPGI has the Oils, Fluids & Additives you need to boost performance and get you back on the road. We currently carry seven Oils, Fluids & Additives to choose from for your 1966 El Camino, and our Price Match Guaranteed prices range from as little as $10.95 up to $75.99. OPGI offers Auburn Gear plus two other trusted brands of Oils, Fluids & Additives for your 1966 El Camino, to help you find quality parts you can rely on. With OPGI's 45-day return policy and thousands of customer reviews, you can shop with the utmost confidence. Enjoy parts delivered directly to your home, or visit our sunny Southern California Showroom & Warehouse to check out our Oils, Fluids & Additives in person.