How Often Should You Change Your Cars Synthetic Oil?
- Kirill Anikin
- Jun 13
- 3 min read
Updated: Aug 20

“The best way to keep your engine running is to treat oil changes like a scheduled meeting with reliability.”
Let’s be honest—most of us are driving more and waiting longer to service our vehicles. But here’s the thing: neglecting your oil change schedule is like skipping dentist appointments. You might not notice the damage right away, but it adds up fast. Especially with synthetic oil in the mix, the rules aren’t what they used to be. At Browns Line Auto, we're clearing the air about oil change frequency so your vehicle—and wallet—can stay in peak condition.
Why Oil Change Frequency Still Matters—Even with Synthetic Oil
There’s a common misconception floating around: “Synthetic oil lasts forever.” Not quite.
Synthetic oil is engineered to last longer than conventional oil—sometimes up to 10,000–15,000 km between changes. That’s a big improvement over traditional 5,000 km intervals. But it doesn’t mean you can ignore it altogether. Every vehicle, every engine, and every driving habit is different. Understanding your oil change frequency is essential to keeping your engine clean, lubricated, and protected from wear.
Factors That Affect Oil Change Frequency
Let’s dive into the real-world variables that affect how often you should change your oil—synthetic or not:
1. Driving Conditions
Are you mostly driving short distances? Sitting in traffic a lot? Frequently towing? These “severe service” conditions mean your oil degrades faster—even synthetic. In these cases, you might need an oil change every 6,000–8,000 km despite using synthetic oil.
2. Type of Vehicle
High-performance engines, turbocharged vehicles, and European imports often demand more frequent oil changes. Check your owner’s manual—it’s not just a suggestion; it’s a tailored guideline.
3. Oil Quality
Not all synthetic oils are created equal. Premium full synthetics can offer longer protection, but cheap blends might not hold up. Always choose a brand that meets or exceeds the API and manufacturer specifications.
4. Time vs. Distance
Don’t forget: even if you’re not driving often, oil still breaks down over time. If you’re not hitting the mileage marker, aim to change synthetic oil at least once a year.

Recommended Oil Change Frequency for Synthetic Oil
So, what’s the sweet spot?
Here’s a practical rule of thumb we use at Browns Line Auto:
Driving Type | Recommended Oil Change Frequency |
Highway Driving | 12,000–15,000 km or once per year |
Mixed Driving | 8,000–12,000 km or every 6–8 months |
City/Stop-Go Driving | 6,000–8,000 km or every 4–6 months |
These are general guidelines. For the most accurate advice? Let us check your oil's condition during routine maintenance.
Signs It’s Time to Change Your Oil—Even If It’s “Not Due Yet”
Don’t blindly follow the sticker on your windshield. Pay attention to your vehicle:
The engine sounds louder than usual
Your oil looks dark and gritty
You smell oil or burning inside the cabin
The check engine or oil light comes on
If you notice any of these, book a visit. Synthetic oil has limits—don't wait until your engine reminds you the hard way.

The Browns Line Auto Approach
At Browns Line Auto, we believe in tailored maintenance. That means we don’t just default to the same number for everyone. Instead, we:
Analyze your driving habits
Check your oil quality
Review your vehicle’s make and model
Give you a personalized recommendation
And when we do change your oil, we use high-quality synthetic oils and OEM filters—so you’re covered between visits.
Final Thoughts: Trust the Experts
Understanding oil change frequency synthetic oil schedules can feel confusing with all the opinions floating around. But with the right service partner, it doesn’t have to be. At Browns Line Auto, we help you cut through the noise and stick to what matters—protecting your investment.
Book your next oil change today, and let’s keep your engine running like new.
Contact Browns Line Auto Today📍 Etobicoke, ON📞 (416) 259-9565🌐 www.brownslineauto.ca
Your car deserves expert care—and we deliver it every time.




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