Give your C3500’s engine a little TLC with routine oil changes. Schedule your next appointment today.
Looking for oil change recommendations for your 1985 GMC C3500? Get the advice you need at Firestone Complete Auto Care! We are experts in car care — not just tires. We know all about motor oil, too. We couldn’t put it better than our technician, Brianna. She likes to explain to customers that, “Oil is the blood of the engine. It’s the #1 thing you can do for your car.”
GMC recommends having your 1985 GMC C3500’s motor oil changed at regular intervals. Check the interval for your vehicle mileage in the table above. Outside of GMC-recommended oil change intervals, your C3500 may need an oil change if your check engine light is on, you hear knock knock knock coming from the engine, smell oil inside the car, or notice excess vehicle exhaust. You may also need an oil change more frequently than GMC recommends if you haul heavy loads, drive in dusty terrain, enjoy off-roading, or go at low speeds on long distance trips. More frequent oil changes generally won't harm 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.
Whether you need high mileage oil, synthetic oil, or conventional oil, you'll find the right 1985 GMC C3500 motor oil at Firestone Complete Auto Care. GMC has most likely outlined either synthetic or conventional as the ideal engine oil for your 1985 C3500. 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 C3500’s oil, replace and recycle your used oil and oil filter, inspect all of your other filters, top-off important fluids, and perform a free inspection on the rest of your vehicle. You can drive easy knowing that we strive to do what's best for your vehicle and take into account your driving style, weather and road conditions,
Wondering if we carry the right motor oil for your GMC? 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 C3500 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 are plenty of motor oils on the market today, so why do we prefer these brands? They are proven winners. For example, when tested in taxi fleets across North America, Quaker State was shown to provide 2x more protection than the industry standard.  There's also Pennzoil. Pennzoil Synthetics feature the capabilities to advance with vehicle technology to offer complete protection for not only the engines of today, but also the engines of tomorrow. For heavy-duty engines, there's Shell Rotella. It's expressly designed for gasoline and diesel 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 1985 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 local Firestone Complete Auto Care has some of the best motor oil for GMC C3500s. We’ll take care of you and your car at your convenience, with the right engine oil at a competitive price. Find out how much your GMC C3500 oil change will cost by calling ahead. Get professional engine care by making an oil change appointment for your C3500 today. Many stores offer extended and weekend openings 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.