Help your 1991 GMC R3500 run newer, longer with routine oil changes. Schedule your oil change appointment today.
Looking for oil change recommendations for your 1991 GMC R3500? Look no further than Firestone Complete Auto Care! We are experts in car care — not just tires. We know all about motor oil, too. After all, "Oil is the blood of the engine. It's the #1 thing you can do for your car," says our maintenance technician, Brianna.
GMC recommends having your 1991 GMC R3500’s motor oil changed at regular intervals. See mileage and month specifics in the above table. Your R3500 may need an oil change right away if your check engine/oil change light is on, you hear knocking sounds coming from the engine, smell oil inside the car, or notice excess vehicle exhaust. You might need an oil change more frequently than what’s recommended by GMC if you regularly haul heavy loads, frequent dusty roads, adventure off-road, or go at low speeds on long distance trips. In general, being extra-diligent about oil changes won’t damage your GMC R3500. In fact, every oil change is an opportunity to diagnose and treat any other issues, such as bad brakes or a failing battery.
Whether it’s synthetic, conventional, or a blend of both — your local Firestone Complete Auto Care has the right oil for your GMC R3500. GMC has recommendations as to whether conventional or synthetic oil is the ideal engine oil for your 1991 R3500. Motor oil helps lubricate the engine’s moving parts, maintain proper engine temperature, and prevent the build-up of harmful substances within the engine. During an oil change, an auto technician will change your R3500’s oil, replace and recycle the old oil and filter, check all of your other filters, top-off important fluids, and perform a free inspection on the rest of your vehicle. You can drive with confidence knowing that we look out for you and your R3500 by taking into account your driving habits, and the number of miles on your odometer.
Wondering what motor oil brands you can find at Firestone Complete Auto Care? We stock outstanding motor oils because that's what your engine deserves. Check your owner's manual and talk with a technician to select the right GMC R3500 oil, whether it's Quaker State® Advanced Durability™ conventional oil, Pennzoil® High Mileage Vehicle® motor oil, Pennzoil Platinum® Full Synthetic motor oil with PurePlus™ Technology, or Shell Rotella® heavy-duty engine oil. There's a reason we carry these motor oil brands. They are champions. 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 expressly designed for gasoline and diesel engines that need to withstand rugged conditions, and is fortified to deliver increased wear protection, heightened performance in extreme temperatures, and improved oxidation resistance. Always refer to GMC's recommendations before going with a new or different motor oil for your 1991 GMC R3500.
The next time your GMC R3500 needs an oil change, you’ll know where to get it. Your local Firestone Complete Auto Care has some of the best motor oil for GMC R3500s. We’ll take care of you and your car at your convenience, with the right engine oil at a competitive price. To find out how much a 1991 R3500 oil change costs, call ahead. Get professional engine care by making an oil change appointment for your R3500 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.