Key Takeaways
Why Car Ownership Myths Are Expensive
Misinformation about car ownership doesn't just lead to bad decisions at the dealership — it shapes how people spend money every month, year after year. Some myths push drivers toward unnecessary expenses. Others create false confidence that results in skipped maintenance or poor purchasing choices. Either way, the financial consequences add up.
The good news is that most of these misconceptions dissolve quickly once you know where to look — starting with your owner's manual, which remains one of the most underused resources any driver has access to. The myths below are among the most persistent and costly. Knowing the facts puts the decision-making back in your hands.
Myth
You must have your car serviced at the dealership to keep your warranty valid.
Fact
Under the Magnuson-Moss Warranty Act, manufacturers generally cannot void your warranty simply because you used an independent repair shop — provided you follow the recommended service schedule and use appropriate parts.
This is one of the most costly misconceptions in car ownership. Many drivers pay dealership prices out of fear, when in fact U.S. federal law protects your right to choose where your vehicle is serviced. The Magnuson-Moss Warranty Act prohibits manufacturers from making warranty coverage conditional on using only their own service centers, as long as the maintenance meets the manufacturer's specifications.
The key is keeping clear records: retain receipts, note the mileage at each service, and confirm that the parts or fluids used match what your owner's manual calls for. A well-documented service history from an independent shop carries the same weight. See our guide to skipping services to understand why following the schedule itself matters most.
Myth
Premium fuel makes any car run better and more efficiently.
Fact
Premium fuel only benefits engines specifically engineered to require or recommend it. Using it in a standard engine typically produces no measurable performance or efficiency gain.
Premium gasoline has a higher octane rating, which resists engine knock in high-compression engines. If your owner's manual says "required," use premium. If it says "recommended" or says nothing at all, regular unleaded is almost certainly the right choice for your engine.
Modern engines with standard compression ratios are tuned for regular fuel. Routinely filling up with premium in such a vehicle is simply spending more at the pump with no return. Check the inside of your fuel door or your owner's manual — that's your definitive guide, not habit or assumption. Our running costs overview covers other small habits that genuinely move the needle on fuel spending.
Myth
Red cars cost more to insure because insurers charge a color surcharge.
Fact
Vehicle color is not a factor that U.S. auto insurers use when calculating premiums. Rates are based on factors like your driving record, location, vehicle make and model, and coverage level.
This myth has persisted for decades, but it simply isn't how insurance pricing works. Insurers assess risk based on measurable factors: your claims history, age, garaging location, annual mileage, and the statistical loss data associated with your vehicle's make, model, and trim level.
What does affect your premium? Engine size, safety ratings, theft rates for your specific model, and how much it costs to repair after a collision. If you want a clearer picture of what's actually driving your rate, see our explanation of how premiums are calculated. Color isn't on the list.
Myth
A car with more miles is always less reliable than one with fewer miles.
Fact
Mileage is one factor among many. A well-maintained high-mileage car is often more reliable than a low-mileage car that has been neglected or left sitting unused.
Engines and mechanical components are generally designed to tolerate high mileage if they receive consistent, correct maintenance. Oil changes, coolant flushes, belt replacements, and brake service done on schedule keep high-mileage cars running soundly. Conversely, a low-mileage vehicle that sat for years without fluid changes, or one driven hard without any upkeep, can be riddled with problems.
When evaluating a used vehicle, prioritize a verifiable service history over the odometer reading alone. Our guide to hidden used car problems walks through what to look and listen for before you commit to a purchase.
Myth
Letting your car's fuel tank run low regularly is harmless.
Fact
Consistently running on a near-empty tank can accelerate wear on the fuel pump, which relies on the surrounding fuel to stay cool and lubricated.
In most modern vehicles, the electric fuel pump sits inside the fuel tank and uses gasoline as a coolant. When the tank level drops very low repeatedly, the pump works harder without adequate cooling, which can shorten its lifespan. Fuel pump replacement is not a cheap repair.
There are also practical safety considerations: running out of fuel in traffic or on a highway creates a real hazard. A good habit is to refuel when the gauge hits about a quarter tank. It's a simple routine adjustment that costs nothing but attention. For more habits that keep running costs manageable, see our full breakdown of car ownership costs.
Putting It Into Practice
Correcting these beliefs isn't just satisfying — it's actionable. Here's a quick checklist of what to do differently:
- Read your owner's manual: It tells you exactly what fuel grade, oil type, and service intervals your vehicle actually needs.
- Keep service records: Whether you use a dealership or an independent shop, document every service with date, mileage, and work performed.
- Understand your insurance: Review your policy rather than assuming what it covers. Our policy decoder can help clarify the jargon.
- Evaluate used cars on condition, not mileage alone: Ask for a pre-purchase inspection by an independent mechanic before buying.
~$100+
Typical premium fuel cost premium per year
Drivers who use premium fuel in vehicles that only require regular can spend over $100 more annually with no measurable benefit, based on average U.S. fuel price differentials.
200,000+
Miles many well-maintained vehicles reach
Consumer vehicle reliability data consistently shows that regular maintenance, not low mileage, is the strongest predictor of long-term vehicle durability.
Car ownership myths that cost money rarely disappear on their own — they spread through habit and repetition. Breaking the cycle starts with asking why before reaching for your wallet. And if you're curious how similar misconceptions appear in other areas of home life, our home repair myths article covers a comparable set of costly beliefs.
Don't Skip Maintenance to Save Short-Term
Delaying recommended services like oil changes, brake inspections, or coolant flushes to save money now can result in significantly larger repair bills later. A neglected timing belt, for example, can cause catastrophic engine damage if it fails. Follow your manufacturer's service schedule — it's designed to protect your investment, not generate unnecessary work.