Help your 1991 GMC C3500 run newer, longer with routine oil changes. Schedule your oil change appointment today.
Not sure how or where to get your GMC C3500’s oil changed? Turn to Firestone Complete Auto Care! We're experts in more than tires. We know the ins and outs of motor oil, too. After all, like our maintenance technician Brianna says, “Oil is the blood of the engine. It’s the #1 thing you can do for your car.”
GMC recommends having your 1991 GMC C3500’s motor oil changed at regular intervals. See mileage and month specifics in the above table. Outside of GMC-recommended oil change intervals, your C3500 may need an oil change if your check engine light is on, you hear knocking sounds coming from the engine, sense an oil smell in the cabin, or see an excess amount of vehicle exhaust. You may also need an oil change more frequently than GMC recommends if you haul heavy loads, drive in dusty terrain, go off-roading a lot, or drive at low speeds for long distances. Generally, getting more frequent oil changes won’t hurt your GMC C3500. In fact, every oil change is an opportunity to diagnose and treat any other issues, such as bad brakes or a failing battery.
Your local Firestone Complete Auto Care has the right 1991 GMC C3500 motor oil: either synthetic or conventional. GMC has most likely outlined either synthetic or conventional as the best motor oil for your 1991 C3500. Motor oil helps lubricate the engine’s moving parts, regulate engine temperature, and keep harmful substances from building up inside the engine. In an oil change service, a technician will change your C3500's oil, replace and recycle your used oil and filter, inspect all of your other filters, top-off essential fluids, and visually inspect the rest of the vehicle. You can rest assured knowing that we seek to do what’s best for your C3500 by considering your driving preferences, and odometer.
Wondering what motor oil brands you can find at Firestone Complete Auto Care? We carry the best because your C3500 deserves the best. Talk with a teammate and consult your owner's manual before picking a motor oil. At Firestone Complete Auto Care, you can choose from the following oils: Quaker State® Advanced Durability™ conventional oil, Pennzoil® High Mileage Vehicle® motor oil, Pennzoil Platinum® Full Synthetic motor oil with PurePlus™ Technology, and Shell Rotella® heavy-duty engine oil. There's a reason we carry these motor oil brands. They are tested and trusted. For example, when tested on taxi fleets from coast to coast, Quaker State was shown to provide double the protection when compared to the industry standard.  Pennzoil is another option. Unlike traditional synthetic motor oils, the Pennzoil Platinum® Full Synthetic line of motor oils with PurePlus® Technology is formulated from pure natural gas, which helps lead to better performance. But don't forget about Shell Rotella for heavy-duty engines. It's specifically designed for diesel and gasoline engines that need to survive the toughest working conditions, and is uniquely fortified to offer heightened performance in extreme temperatures, increased wear protection, and better oxidation resistance. For help picking the correct motor oil for your 1991 GMC C3500, refer to GMC's recommendations first.
When the time for your C3500’s next oil change rolls around, you know where to go! Your nearest Firestone Complete Auto Care has the ideal oil for your C3500’s engine. We’ll take care of you and your car at your convenience, with the right oil at the right price. Call ahead to find out how much oil changes cost for 1991 GMC C3500s. Get professional engine care by making an oil change appointment for your C3500 today. Many stores are open late and on weekends for your convenience.
 ILSAC GF-5 represents the latest performance standard set by the International Lubricant Standardization and Approval Committee (ILSAC), a joint effort of U.S. and Japanese automobile manufacturers. Most automobile manufacturers are expected to recommend oils that meet ILSAC GF-5. API SN is the most recent service category issued by API’s Lubricants Group. Oils meeting API SN and the new “Resource Conserving” designation meet all ILSAC GF-5 performance requirements.