Help your 1988 S15 engine last longer with regular oil changes and lube service. Schedule an appointment now!
Need more info about 1988 GMC S15 oil changes? Look no further than Firestone Complete Auto Care! Our expertise goes beyond 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.”
Your 1988 S15’s oil should be changed according to GMC’s recommended oil change intervals. See mileage and month specifics in the above table. Outside of GMC-recommended oil change intervals, your S15 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 vehicle, 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, drive in dusty areas, go off-roading a lot, or drive at low speeds for long distances. More frequent oil changes generally won't harm your GMC S15. In fact, more frequent oil changes give our technicians more opportunities to catch and alert you to any issues, like worn brake pads or a weak battery.
Whether you need high mileage oil, synthetic oil, or conventional oil, you'll find the right 1988 GMC S15 motor oil at Firestone Complete Auto Care. GMC has specifically identified either synthetic or conventional as the best motor oil for your 1988 S15. 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 your oil change service, one of our techs will change your S15’s oil, replace and recycle your used oil and oil filter, inspect the rest of your car’s 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 habits, climate,
Wondering what motor oil brands you can find at Firestone Complete Auto Care? Your S15 engine deserves the very best, which is why we only stock 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. There are plenty of motor oils on the market today, so why do we prefer these brands? They are champions. For instance, when tested in taxi fleets across North America, Quaker State was shown to provide 2x more protection than the industry standard.  And 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 made for gasoline and diesel engines that need to overcome the strenuous working conditions, and is uniquely strengthened to deliver improved oxidation resistance, heightened performance in extreme temperatures, and increased wear protection. For help picking the correct motor oil for your 1988 GMC S15, refer to GMC's recommendations first.
When the time for your S15’s next oil change rolls around, you know where to turn. Your local Firestone Complete Auto Care carries some of the most reliable engine oils for GMC vehicles. 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. Let the experts take care of your S15’s engine by making an oil change appointment 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.