Oil Changes for 1990 GMC S15

Get Your GMC S15 Oil Changed

Give your S15’s engine a little TLC with routine oil changes. Schedule your next appointment today.

1990 GMC S15 Maintenance Schedule

What is the manufacturer-recommended maintenance schedule for a 1990 GMC S15? Find maintenance info for your vehicle.

How Often to Get 1990 GMC S15 Oil Changes

Need more info about 1990 GMC S15 oil changes? Get the advice you need at Firestone Complete Auto Care! We're experts in more than 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 1990 GMC S15’s motor oil changed at regular intervals. Check out mileage and month info for your S15 in the above table. No matter the mileage, your S15 may need its oil changed ASAP if your check engine light is on, you hear knocking sounds 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, frequent dusty roads, enjoy off-roading, or drive at low speeds for long distances. 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.

What’s the Right Type of Oil for 1990 GMC S15?

Your local Firestone Complete Auto Care has the right 1990 GMC S15 motor oil: either synthetic or conventional. GMC has most likely outlined either synthetic or conventional as the best motor oil for your 1990 S15. Motor oil reduces friction between engine components, maintain proper engine temperature, and keep harmful substances from building up inside the engine. During an oil change, one of our techs will change your S15’s oil, replace and recycle the old oil and filter, inspect the rest of your car’s filters, refill vital car fluids, and visually inspect the rest of the vehicle. You can rest assured knowing that we seek to do what’s best for your S15 by considering your driving habits, and mileage.

Types of Motor Oil for GMCs

Wondering if we carry the right motor oil for your GMC? Your S15 engine deserves the very best, which is why we only stock the best! Talk with a teammate and consult your owner's manual before picking a motor oil. At Firestone Complete Auto Care, you can choose from the following oils: Quaker State® Advanced Durability™ conventional oil, Pennzoil® High Mileage Vehicle® motor oil, Pennzoil Platinum® Full Synthetic motor oil with PurePlus™ Technology, and Shell Rotella® heavy-duty engine oil. With so many motor oil brands in the market, why do we carry these brands? They are champions. For instance, Quaker State was shown to provide 2x more protection than the industry standard when tested in taxi fleets across the country. [1] There's also Pennzoil. Pennzoil Synthetics are the most technologically advanced, fully formulated motor oils available and exceed current industry and manufacturer requirements. Then there's Shell Rotella heavy-duty engine oil. It's specifically designed for diesel and gasoline engines that need to overcome the strenuous working conditions, and is fortified to deliver improved oxidation resistance, heightened performance in extreme temperatures, and increased wear protection. For help picking the correct motor oil for your 1990 GMC S15, refer to GMC's recommendations first.

Where to Get an Oil Change for GMC S15

When the time for your S15’s next oil change rolls around, you know where to go! 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 motor oil at the right price. Call ahead to find out how much oil changes cost for 1990 GMC S15s. 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.

[1] 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.

1990 GMC S15 Oil Change Questions

  • What can low oil do to my GMC S15 engine? Engine oil lubricates moving parts in your engine. If you're low or out of oil, these components can grind against each other, overheat, and eventually lead to GMC S15 engine failure. That’s why you should check your oil and get it changed regularly.
  • How hard is it to change GMC S15 oil at home? First off, changing your own oil isn’t as easy as you’d think. You’ll have to figure out how to properly dispose of the oil and buy special tools. Having your oil professionally changed reduces the chances of something going wrong with the oil change, but also help your car perform down the road.
  • Why is my GMC S15 exhaust smoke grayish or blue? There could be an oil leak and your engine is burning oil. Looks like it’s time for a professional to take a look. The leak could be the result of worn valve seals, blown piston rings, or worn cylinder walls.