Myth #1: Transmission fluid should be flushed.
Mechanics sometimes recommend transmission service and fluid changes as frequently as every 50,000 miles, according to Cars.com, but is it necessary? Consumer Reports says usually not. Most modern vehicles use “long-life” transmission fluid that is designed to last for 100,000 miles or sometimes for the life of the vehicle. Since vehicles can vary, consider following the manufacturer’s recommendation as to how often to change your transmission fluid, says Cars.com.
Myth #2: Using the air conditioner is better for fuel economy than opening the windows.
It’s difficult to say for sure, because fuel economy can vary depending on your vehicle. Some people think that opening your car’s windows increases drag. But Consumer Reports tested this theory and determined that rolling down the windows at 65 mph did not noticeably reduce fuel economy.
And while running the AC may reduce fuel economy by 1 to 4 mpg according to Consumer Reports, the site recommends using it because it dehumidifies the car’s interior, which may help keep the driver alert.
Myth #3: High-octane premium fuel is better for all engines.
When it comes to your car’s fuel, premium doesn’t always mean better. Unless your vehicle’s owner’s manual specifically states that your car requires premium fuel, it may not be necessary, Consumer Reports says. You can avoid the extra cost for premium fuel if your vehicle doesn’t require it.
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