Diversified Petroleum Service

A 2026 Google customer wrote that at 9 a.m. on a Sunday before a blizzard, Diversified Petroleum Service had just delivered oil to their home so they would not run out during the storm. The company delivers home heating oil and describes itself on its website as a locally owned and operated family business based in Wolcott, CT since 1996, listing a service area that includes Waterbury, Bristol, Southington, Cheshire and Naugatuck. It holds 4.9 stars from 69 Google ratings and an A+ grade from the Better Business Bureau. A wfsb.com report has described John Glowasky, owner of Diversified Petroleum Service in Wolcott, navigating snow and ice on his delivery routes. A 2024 customer said their own oil company could not help when they ran out, and Diversified and owner John came out, delivered oil and got their furnace going within an hour, even though they were not yet a customer. A 2025 customer wrote that one wintry morning John made the delivery to their elderly mother, who had been without heat for several hours, and brought her a hot cup of tea. A 2022 customer who ran out of oil while away and came home to a frozen house said the company came out within hours of the call on a Saturday and restarted the furnace. A 2023 customer said they called at 8 a.m. on a Monday after running out of oil and were up and running again by 9 a.m. A 2026 customer said their oil was filled quickly and called Ilona helpful, responsive and professional. A 2025 customer of about six years said the company consistently delivered their oil within a day. A 2025 customer gave one star after calling to place an order, saying the woman on the phone became rude when asked to check past deliveries, and that the customer's husband was charged a lower amount for the same request when he called shortly after.