Conventional Oil Vs. Synthetic Oil: What’s The Difference?

April 6, 2022

Synthetic oil has long been lauded as a superior alternative to conventional oil due to being more eco-friendly. But it’s been hard to convince drivers to pay 6 to 10 times the price for man-made oil instead of traditional one has been hard. In the end, could the benefits of using synthetic oil really be worth the high price point?

The Similarities And Differences


Contrary to what some may believe, most synthetic oil is somewhat similar to conventional oil, in that they are both the end product of refining crude oil. The primary difference between the two is the level at which the oil is being refined. 


There are several synthetic oils that use artificially made compounds as the base, but they’re still quite a rarity. In the US, the type of synthetic oil you’re most likely to encounter would be what manufacturers classify as  Oil Grade Group III . Synthetic oil that uses highly refined crude oil as the base and is enhanced by additives for better performance (and vehicle preservation) during the manufacturing process.


Synthetic oil and conventional oil also look similar – visually, you won’t be able to differentiate between the two of them. The big difference is how they change when they’ve run in your car for a while. 


Conventional oil will start losing its form much quicker than synthetic oil. It’ll get a lot thicker and sludgier than it originally was, and will need to be changed much quicker to prevent it from leaving deposits they may start plugging leaks in your car.


Synthetic oil, by comparison, will maintain its original form for much longer. Its uniform molecular size and fewer impurities ensure that it thickens far more slowly, burns cleaner (thus the eco-friendliness), and leaves far fewer deposits over the time it’s in use. 

Benefits Of Switching To Synthetic Oil


The biggest upside of switching to synthetic oil is the increased engine protection, as well as less wearing from lower friction. As synthetic oil has a uniform molecular size, it significantly reduces the friction, while additional refinement and engineering of the oil goes through reducing deposits. 


Synthetic oil producers also fortify their products with additives that can clean engines. If your seal gets clogged and leaks are plugged, switching to synthetic oil can clean the deposits.


Synthetic oil has also been shown to function better in extreme weather, particularly lower temperatures, than conventional oil.


On the other hand, it must be noted that promised fuel economy is likely not going to be all that noticeable. While you may burn less overall, considering the high price point, you aren’t likely to cut your gas budget anytime soon. It may, however, save you some costs long-term by preserving the engine.

Where To Get An Oil Change?



Have you been googling tire shop near me recently? Crown City Tire Auto Care is a tire shop and car repair Pasadena service offering high-quality service and great prices. Our dedication to providing the best results for the best prices has earned us the mantle of Best of 2021 by Pasadena Weekly. Feel free to give us a call at 626-461-9165 to help you with your next oil change!


April 2, 2025
We all love that fresh, clean feeling when we step into our cars, especially after a long day navigating the bustling streets of Pasadena. But have you ever stopped to think about the air you're actually breathing inside your vehicle? Often overlooked, the cabin air filter plays a crucial role in the quality of your in-car environment. At Crown City Tire Auto Care in Pasadena, we believe in empowering our customers with the knowledge to keep their vehicles running smoothly and their occupants healthy. So, let's dive into the often-neglected world of the cabin air filter and uncover the dirty truth about when it's time for a replacement. For many drivers in Pasadena and beyond, the engine air filter gets all the attention. It makes sense – it's directly linked to engine performance and fuel efficiency. However, the cabin air filter, while not impacting how your car runs, significantly affects the air you and your passengers breathe. Think of it as the air purifier for your vehicle's interior. It's designed to trap dust, pollen, mold spores, pet dander, and even airborne pollutants that can enter your car's ventilation system from the outside. Why Should Pasadena Drivers Care About Their Cabin Air Filter? Living in a vibrant city like Pasadena, CA, exposes our vehicles to a variety of environmental factors. From the seasonal blooms releasing pollen into the air to the everyday dust and smog of urban driving, our car interiors can become surprisingly contaminated. A clogged or dirty cabin air filter can lead to a host of issues, some you might not even realize are connected: Reduced Airflow: A blocked filter restricts the amount of air that can pass through your car's heating and cooling system. This can lead to weak airflow from your vents, making it harder to heat or cool your cabin effectively, especially during those hot Pasadena summers or cooler winter evenings. We've seen many customers at Crown City Tire Auto Care surprised at the improvement in their AC performance after a simple cabin air filter replacement. Unpleasant Odors: Over time, trapped particles and moisture in the filter can become breeding grounds for bacteria and mold, leading to musty or unpleasant odors circulating in your car. If you've noticed a persistent stale smell, even after cleaning your interior, your cabin air filter could be the culprit. Allergic Reactions and Respiratory Issues: For allergy sufferers or individuals with respiratory sensitivities living in Pasadena, a clean cabin air filter is paramount. A dirty filter recirculates allergens and irritants, potentially exacerbating symptoms like sneezing, coughing, and itchy eyes. Replacing your filter regularly can significantly improve the air quality and comfort for everyone in the vehicle. Strain on Your HVAC System: When the cabin air filter is clogged, your car's blower motor has to work harder to push air through. This increased strain can potentially shorten the lifespan of components in your heating, ventilation, and air conditioning (HVAC) system, leading to more costly repairs down the line. At Crown City Tire Auto Care in Pasadena, we always recommend preventative maintenance to avoid such issues. So, When Exactly Should Pasadena Drivers Replace Their Cabin Air Filter? While there's no one-size-fits-all answer, several factors can help you determine when it's time for a new cabin air filter in your vehicle: Manufacturer Recommendations: Your vehicle's owner's manual will typically provide a recommended replacement interval for the cabin air filter. This is a good starting point, often suggesting replacement every 12,000 to 15,000 miles or once a year. We at Crown City Tire Auto Care generally advise following these guidelines as a minimum. Visual Inspection: One of the easiest ways to check your cabin air filter is to visually inspect it. The location of the filter varies depending on your vehicle's make and model, but it's often located behind the glove compartment or under the dashboard. Consult your owner's manual for the exact location. Once you've accessed it, take a look. A clean filter will be relatively white or light gray. If it's visibly dirty, clogged with debris, or dark in color, it's definitely time for a replacement. We often show our customers in Pasadena their old filter versus a new one – the difference can be quite striking! Reduced Airflow: As mentioned earlier, a noticeable decrease in the airflow from your vents is a strong indicator of a clogged cabin air filter. If you find yourself turning the fan up higher than usual to achieve the same level of cooling or heating, have your filter checked. Unpleasant Odors: If you consistently notice musty or other unpleasant smells when your ventilation system is running, your cabin air filter is likely trapping odor-causing particles and needs to be replaced. Allergy Season and Driving Conditions in Pasadena: If you frequently drive in dusty conditions, heavy traffic with exhaust fumes, or during peak allergy seasons in Pasadena, your cabin air filter will likely need more frequent replacement. These conditions expose your filter to a higher volume of contaminants. Time Since Last Replacement: Even if you haven't driven many miles, the filter material can degrade over time and lose its effectiveness. If it's been over a year since your last cabin air filter replacement, it's a good idea to have it checked, especially considering the air quality in and around Pasadena. What Happens During a Cabin Air Filter Replacement at Crown City Tire Auto Care? When you bring your vehicle to Crown City Tire Auto Care in Pasadena for a cabin air filter replacement, our experienced technicians will: Locate the Cabin Air Filter: We'll identify the precise location of your vehicle's cabin air filter based on its make and model. Remove the Old Filter: We'll carefully remove the old, dirty filter. You'll likely be surprised at the amount of debris it has collected! Inspect the Housing: We'll check the filter housing for any signs of damage or excessive buildup. Install a New, High-Quality Filter: We use high-quality cabin air filters that meet or exceed manufacturer specifications, ensuring optimal filtration and airflow. Verify Proper Airflow: After installing the new filter, we'll test your vehicle's ventilation system to ensure proper airflow and functionality. Investing in Your In-Car Air Quality with Crown City Tire Auto Care Replacing your cabin air filter is a relatively inexpensive yet highly impactful maintenance task. It's a simple way to improve the air quality inside your vehicle, enhance the performance of your HVAC system, and contribute to a more comfortable and healthier driving experience, especially here in Pasadena. At Crown City Tire Auto Care in Pasadena, we're committed to providing comprehensive auto care services, and that includes ensuring the air you breathe in your car is clean and fresh. Don't wait until you notice strong odors or drastically reduced airflow. Make it a habit to have your cabin air filter checked regularly as part of your routine maintenance. We understand that life in Pasadena can be busy, and it's easy to overlook these smaller maintenance items. That's why we're here to help. Our friendly team at Crown City Tire Auto Care is always ready to answer your questions and provide expert advice on all your automotive needs. We believe that informed drivers make better decisions about their vehicle care, and we're here to be your trusted partner on the road. So, the next time you're thinking about your car's maintenance, remember the "dirty truth" about your cabin air filter. It's a small investment that can make a big difference in your driving comfort and well-being. Let the professionals at Crown City Tire Auto Care in Pasadena help you breathe easier on every journey.
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