Oil is an important component when it comes to caring for your vehicle because it helps keep all the moving parts lubricated and running properly while you travel around the St. Charles, St. Louis, O'Fallon, and Saint Peters, MO, areas. When it's time to change it out for a clean batch, you might be asking yourself whether synthetic or semi-synthetic works best for your vehicle.

Here at St. Charles Nissan, we want your car to continue running as smoothly as the day you bought it for years to come, and we know that means you need to be informed about your routine maintenance needs. In order to make that as simple as possible, we created this breakdown of synthetic vs. semi-synthetic oil.

Synthetic vs Semi-Synthetic Oil: A Breakdown


Benefits of Synthetic Oil

  • Environmentally friendly
  • Contains fewer impurities
  • Improves fuel economy


Benefits of Semi-Synthetic Oil

  • Works well in low temperatures
  • Provides engine defense for heavy loads
  • Helps with towing and off-roading

Full synthetic oil contains fewer impurities than mineral oil, which helps make it more environmentally friendly by cutting engine emissions. This type of oil lasts longer than semi-synthetic, and also provides higher MPG ratings. It can also withstand very high heat, thus providing more longevity while you're out on the road.

Semi-synthetic oil is also known as a synthetic blend, because it is typically made by combining conventional oils or mineral oils, and contains no more than 30% fully synthetic oil. This type of oil is typically used with vehicles that are prone to off-roading adventures or have high towing capacities.

Which Oil Works Best for Me?

You'll be able to find the oil that works best for your vehicle in your owner's manual, and the basic rule of thumb is that you should never downgrade from what it recommends.

Typically, fully synthetic oil will work on most vehicles, while semi-synthetic could accelerate wear and tear if it's used on the wrong one.

Our Service Center

If you don't feel comfortable changing your oil on your own, just bring your vehicle by our service center. Our highly trained technicians are available to help you with any job, no matter how large or small it may be. We only use original equipment manufacturer (OEM) products, so you know you're getting the highest quality available when you come to us.

  • Oil and filter changes
  • Fluid top-offs
  • Inspections
  • Engine and transmission repairs
  • Brake fluid changes

Schedule Your Next Service Appointment

There are a couple of ways you can schedule your next service appointment with us.

The easiest is right here on our website. All you'll need to do is fill out your contact information, vehicle information, a brief description of what you need done, and what time works best for you. Then, we'll reach out to confirm your appointment. Returning customers can just sign right in, and all your information will be there.

If you'd prefer to speak with someone directly, just give us a call or swing by. We'd be happy to answer any questions you might have, so you feel comfortable and informed about the work you need done.

Contact Us Today 

Here at St. Charles Nissan, we're dedicated to helping you with all your vehicle needs, so you can stay out on the roads of St. Charles, St. Louis, O'Fallon, and Saint Peters, Missouri. For more information, contact us today!

Make an Inquiry


St. Charles Nissan

5625 Veterans Memorial Pkwy
Directions Saint Peters, MO 63376

  • Sales: (636) 441-4481
  • Service: (636) 441-4481
  • Parts: (636) 441-4481


  • Monday 9:00AM - 9:00PM
  • Tuesday 9:00AM - 6:00PM
  • Wednesday 9:00AM - 9:00PM
  • Thursday 9:00AM - 6:00PM
  • Friday 9:00AM - 9:00PM
  • Saturday 9:00AM - 6:00PM
  • Sunday Closed