Help your 1985 S15 engine last longer with regular oil changes and lube service. Schedule an appointment now!
Need more info about 1985 GMC S15 oil changes? Turn to Firestone Complete Auto Care! Our expertise goes beyond tires. Oil and lube services are also our specialties. 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 changing your 1985 S15’s oil at regular intervals. Check the interval for your vehicle mileage in the table above. Outside of GMC-recommended oil change intervals, your S15 may need an oil change if your check engine light is on, you hear knocking sounds coming from the engine, smell oil inside the car, or notice an unusual amount of 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. Generally, getting more frequent oil changes won’t hurt your GMC S15. 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 S15 motor oil at Firestone Complete Auto Care. GMC has specifically identified either synthetic or conventional as the best oil for 1985 GMC S15 vehicles. Motor oil reduces friction between engine components, keep the engine cool, and prevent the build-up of harmful substances within the engine. In an oil change service, an auto technician will change your S15’s oil, replace and recycle the old oil and 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 preferences, weather and road conditions,
What motor oils are available at Firestone Complete Auto Care? We carry the best because your S15 deserves the best. Check your owner's manual and talk with a technician to select the right GMC S15 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 example, Quaker State was shown to provide 2x more protection than the industry standard when tested in taxi fleets across the country.  There's also Pennzoil. 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. Then there's Shell Rotella heavy-duty engine oil. It's expressly designed for gasoline and diesel engines that need to withstand rugged conditions, and is uniquely strengthened to deliver increased wear protection, heightened performance in extreme temperatures, and improved oxidation resistance. For help selecting the right motor oil for your 1985 GMC S15, defer to GMC's recommendations.
When it's time for a 1985 GMC S15 oil change, you’ll know where to get it. Your local Firestone Complete Auto Care has some of the best motor oil for GMC S15s. We’ll take care of you and your car at your convenience, with the right oil at the right price. Find out how much your GMC S15 oil change will cost by calling ahead. Make an appointment for an oil change service today and let the oil experts take care of your S15's engine. 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.