Based in Delano, California, Greg's Petroleum Service Inc. is a family owned and operated petroleum distributor. Since opening for business in 1961, our commitment to customer service, reliability, and safety has set us apart. For over 50 years, we have served retail, agricultural, oilfield, commercial, and government accounts throughout the San Joaquin Valley and beyond. We pride ourselves on supplying the most advanced products and utilizing state of the art technologies while continuing to value our customer relationships as highly as we did over 50 years ago.