Need more info about 1985 GMC G3500 oil changes? Turn to Firestone Complete Auto Care! Our expertise goes beyond tires. We know all about 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.”
Your 1985 G3500’s oil should be changed according to GMC’s recommended oil change intervals. Check the interval for your vehicle mileage in the table above. Outside of GMC-recommended oil change intervals, your G3500 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 might need an oil change more frequently than what’s recommended by GMC if you regularly haul heavy loads, frequent dusty roads, enjoy off-roading, or go at low speeds on long distance trips. In general, being extra-diligent about oil changes won’t damage your GMC G3500. 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 1985 GMC G3500 motor oil: either synthetic or conventional. GMC has most likely outlined either synthetic or conventional as the best motor oil for your 1985 G3500. Motor oil helps lubricate the engine’s moving parts, regulate engine temperature, and prevent the build-up of harmful substances within the engine. During your oil change service, one of our techs will change your G3500’s oil, replace and recycle the old oil and filter, inspect the rest of your car’s filters, refill vital car fluids, and perform a courtesy inspection on your entire vehicle. You can drive with confidence knowing that we look out for you and your G3500 by taking into account your driving style, and 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 G3500 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. With so many motor oil brands in the market, why do we carry these brands? They are proven winners. For instance, when tested on taxi fleets from coast to coast, Quaker State was shown to provide double the protection when compared to the industry standard.  There's also Pennzoil. Pennzoil Synthetics are the most technologically advanced, fully formulated motor oils available and exceed current industry and manufacturer requirements. For heavy-duty engines, there's Shell Rotella. It's specifically designed for diesel and gasoline engines that need to withstand rugged conditions, and is uniquely fortified to offer increased wear protection, heightened performance in extreme temperatures, and improved oxidation resistance. For help selecting the right motor oil for your 1985 GMC G3500, defer to GMC's recommendations.
The next time your GMC G3500 needs an oil change, you know where to go! Your local Firestone Complete Auto Care carries some of the most reliable engine oils for GMC vehicles. We’ve got convenient appointment times to take care of you, with the right oil at the right price. To find out how much a 1985 G3500 oil change costs, call ahead. Make an appointment for an oil change service today and let the oil experts take care of your G3500's engine. 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.
Give your G3500’s engine a little TLC with routine oil changes. Schedule your next appointment today.