Most Denton TX drivers know when it’s time for an oil change, either by mileage or that little sticker on the windshield. But when the Texas summer hits and temps start cooking, that regular oil change routine might need a second look. Texas heat can also break down engine oil faster, and can put more strain on your vehicle than you’d expect.

So, how often and when should you change your oil during the Texas summer? Let’s break it down and keep your car running like it should even when it’s 100°+ out.

What Drivers Should Know About Thinning Motor Oil

When temps start climbing past 100°, your motor oil has to work overtime. In hot climates like North Texas, extreme heat can cause oil to thin out more quickly than usual. This is especially true for conventional motor oil, which doesn’t hold up to high temperatures as well as synthetic blends or full synthetic oils. Conventional motor oil is made from refined crude oil and contains more impurities and fewer performance-enhancing additives than synthetic blends. As a result, it’s less stable under high temperatures and tends to break down faster, meaning it can thin out sooner and lose its protective properties. As oil thins, it loses its ability to coat engine components properly and can leave metal parts more exposed and vulnerable to friction.

One thing drivers should also keep in mind: thinning oil doesn’t just reduce protection, it can also lead to faster oil consumption. That means your vehicle may burn through oil more quickly in extreme heat, even if you haven’t hit your mileage mark yet.

Once that protective layer starts breaking down, your engine doesn’t get the lubrication it needs. The oil simply can’t cling to surfaces the same way, especially when it’s been sitting in the heat day after day. This reduces the oil’s overall effectiveness and puts more strain on your engine during every drive. Over time, that can lead to:

• Increased engine wear from metal-on-metal contact
• Higher operating temperatures due to poor heat transfer
• Lower engine efficiency and potential long-term damage

Everyday Driving Habits that Break Down Your Oil

Let’s be real, most of us are cranking the AC the moment we get in the car. But that constant AC use puts added strain on your engine, which over time can contribute to faster oil breakdown. And it’s not just about what’s happening under the hood, driving habits play a big role too. More people are on the road this time of year, whether it’s weekend trips, vacations, or just getting across town during rush hour. In areas like Denton and DFW, it’s not uncommon to hit construction delays, red lights every few blocks, or heavy traffic on your way to work.

All of that short trips, frequent stops, and long idle times is not a good combo for your engine. Your engine doesn’t always get the chance to run at an ideal pace, which means your motor oil ends up doing more with less.

Things Your Car Needs Before a Long Drive

Planning a road trip? Summer is a common time for longer drives, whether you’re heading out of state or just making more weekend plans than usual. If your next oil change is coming up (or if you’re already overdue), don’t wait until you’re halfway to Florida. It’s always better to hit the road on fresh, clean oil than risk engine wear mid-trip.

Even if your oil change isn’t quite due yet, the extra mileage from a single long drive could push you past that recommended window. In some cases, it’s worth scheduling one before and after a trip to help your engine recover and stay protected.

Before you head out, it’s also a good idea to check a few other key things that you might forget about:

• Fluid levels — Make sure engine oil, brake fluid, coolant, transmission fluid, and windshield washer fluid are all where they should be. Low or dirty fluids can cause major issues on long drives.
• Tire pressure — Under- or over-inflated tires can reduce fuel efficiency, mess with your handling, and increase your risk of a blowout—especially at highway speeds.
• Filters — Cabin and engine air filters can get clogged faster in dusty conditions or with extra miles. A clean filter helps your engine breathe easier and your AC run better.

Getting a full vehicle inspection before a long trip helps you avoid any surprises because no one wants to spend vacation time waiting on a tow truck.

What Your Car Manual Doesn’t Tell You

Manufacturer maintenance schedules are typically based on normal driving conditions, which usually means smooth roads, mild climates, and steady driving. What they don’t account for is the reality of where and how you actually drive. They aren’t customized to your city, your traffic patterns, or your road conditions. That’s why it’s always a good idea to check in with a local mechanic who can help you determine a maintenance schedule that makes more sense for your day-to-day routine.

How far you drive, how often you’re behind the wheel, and even what types of roads you take, like frequent construction zones, pothole-heavy routes, or long stretches of stop-and-go traffic, can all impact how often you should be changing your oil, checking your tires, or replacing filters. Your mechanic can review your vehicle’s maintenance recommendations and help adjust your service schedule based on the real wear and tear your car really sees.

Make Your Next Oil Change Count

Staying ahead of it helps extend your engine’s life, improves performance, and can save you from bigger repairs down the line.

• Schedule your next oil change at Kwik Kar before your vehicle starts feeling the strain.
• Stop by for a full-service check before your next road trip. We’ll inspect fluids, tires, filters, and more.
• Not sure what kind of schedule fits your car? Talk to one of our mechanics we’ll take a look at your manufacturer recommendations and driving habits to figure out what makes the most sense for your vehicle.