Kelley Oil Company, known as KW Oil, is a prominent division of the Kelley Williamson Company, established in 1926. With a rich heritage in the petroleum industry, KW Oil has grown from its humble beginnings into a leading supplier of oils and lubricants across Northern Illinois and Southern Wisconsin. The brand is committed to delivering high-quality products tailored for various sectors, including industrial, commercial, agricultural, marine, and aviation.

KW Oil's extensive product lineup features renowned brands such as Mobil, Mobil 1, and Quaker, among others. In addition to top-tier oils and lubricants, the company offers an array of specialized services, including expert consultations, oil analysis, and tank monitoring solutions to ensure optimal performance for its customers.

Rooted in principles of integrity, quality, and timely service, KW Oil focuses on exceeding customer expectations while constantly embracing new technologies. With nearly 50 Kelley’s Market convenience stores, KW Oil is dedicated to providing convenient access to premium fuel and lubricants for its diverse clientele.