There is always advice and “life hacks” floating around the internet but they aren’t always accurate. As a car owner and car insurance policy holder, it is important to know which “facts” about your car are true or downright mythological so you can ensure the proper care and longevity of your vehicle.

Here are some of the most common myths we found being portrayed as fact that could do more harm than good for the care of your vehicle or its resale value.

We aren’t quite sure where this one originated from but there are several sites offering this advice. While it may appear so for some vehicles, Consumer Reports actually did an experiment and found no noticeable fuel economy or savings compared to using AC at 65mph and having the windows rolled down at 65mph. So, if you have a working AC, you might as well enjoy it—especially in the hot Florida weather.

This once held some truth for older vehicles; however, most cars on the road typically don’t need their transmission to be “flushed”. Most vehicles produced today come standard with a “life-long” transmission fluid, lasting most vehicles 100,000 miles or even more depending on how well the car was cared for. When it comes down to it, the best advice to follow is what is provided in your car’s manufacturer’s handbook.

“Premium” may have a nice ring to it, but it doesn’t mean that it is better fuel for all engine types. For some engines, premium fuel does not provide any benefit and is just a drain on your wallet. Stick to your vehicle’s manufacturer recommendations for the type of fuel to maximize your gas mileage and vehicle care.

So, there you have it! Some of the most touted “facts” we found when it came to vehicle maintenance and maximized fuel economy. We also found some car insurance myths to bust. You can’t believe everything you read on the internet—so be sure to do your research (using reputable sources)  before changing anything recommended by your vehicle’s manufacturer.

If you are worried about myths surrounding your car insurance rates, check out this quick read: 5 Personal Factors That Affect Car Insurance Rates. You can also see how your deductible can affect your rate as well.