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5 min read

7 Common Car Myths Debunked

By Tina Ormond on Oct 8, 2026, 1:45:00 PM

Believing outdated advice about auto maintenance can cost time, money, and unnecessary stress. Many drivers carry around assumptions about vehicle service that simply do not hold up with modern automotive technology. Clearing up these common misconceptions helps ensure cars run smoothly and reliably for years to come.

Independent Shops Can Handle Warranty Service

A widespread myth is that a dealership is the only place allowed to perform warranty work. Independent repair facilities can handle many warranty-related services. In some cases, independent shops can become officially certified to perform manufacturer warranty repairs directly. Other times, the work can be completed at a trusted shop and submitted to the vehicle manufacturer for reimbursement. It is always worth checking with a favorite local technician before automatically heading to a dealer.

Premium Gas Does Not Boost Every Engine

Many people assume that filling up with premium fuel automatically gives any vehicle better performance or fuel economy. Premium gas is specifically required for vehicles engineered with high-compression engines. If an owner's manual states that regular unleaded fuel is sufficient, adding premium fuel will not improve performance in any way. Sticking to the fuel octane level recommended by the vehicle manufacturer is the best path.

Modern Engines Do Not Need Long Warm-Ups

Idling a car for ten minutes on cold winter mornings is an old habit that modern fuel-injected engines no longer require. Sitting at idle for extended periods actually wastes fuel and prolongs the time it takes for the engine to reach optimal operating temperature. Letting the engine run for about one minute allows vital fluids to circulate properly. After that brief pause, driving gently for the first few minutes warms up the engine, transmission, and suspension components safely and efficiently.

Synthetic Oil Protects Better But Still Needs Regular Care

Synthetic oil provides superior protection against high temperatures and helps prevent engine sludge build-up. However, using synthetic oil does not mean maintenance intervals should be pushed to the extreme limit. While some manufacturers suggest long intervals, changing the oil every 3,000 to 5,000 miles keeps the engine running much cleaner and significantly extends its overall lifespan. Regular oil changes remain one of the least expensive ways to avoid costly engine repairs.

Proper Tire Pressure is On the Door Jamb

When checking or adjusting tire pressure, looking at the sidewall of the tire is a mistake. The PSI printed on the tire sidewall represents the maximum pressure the tire can safely hold, not the recommended setting for daily driving. The correct numbers are listed on the tire information placard located inside the driver-side door jamb. Filling tires to the manufacturer's recommended specs ensures proper handling, optimal fuel economy, and even tire wear.

The Low Fuel Light Is Warning of Reserve Capacity

Driving around with the fuel light glowing is a risky game, but the light does not mean the gas tank is completely empty. Manufacturers build in a small reserve capacity to give drivers time to reach a gas station safely. Even so, relying on that reserve regularly is tough on the vehicle. Fuel cools and lubricates the fuel pump, so running low on gas can cause premature fuel pump failure. Heading to the pump as soon as the light turns on saves both time and money on repair bills.

Strange Noises Are Not Always Engine Problems

Hearing a thumping or clunking sound while driving can lead to instant panic about major engine damage. More often than not, clunks, thumps, and rattles originate from worn suspension components like struts, ball joints, or sway bar links rather than the engine itself. Having an ASE-certified technician perform a thorough diagnostic inspection using specialized diagnostic tools pinpoints the exact root cause, eliminating guesswork and easing unnecessary stress.

Keeping up with accurate service information ensures peace of mind on the road. For expert advice, routine maintenance, and reliable diagnostics, reach out to the team at DeBoer's Auto by calling 973-786-3030 or visiting www.autorepair.shop.

Tina Ormond

Written by Tina Ormond

Tina Ormond is a highly experienced Store Manager in the automotive industry with over 15 years of experience. She brings a unique blend of innovation and expertise to her role. Drawing from her background in Social Science, Tina seamlessly integrates her love for people into effectively guiding daily operations. From coordinating customer support teams to managing back-of-the-house operations, Tina ensures excellence in repairs and technical support while prioritizing customer satisfaction. With a deep understanding of automotive intricacies cultivated in dealership environments, Tina's blogs offer valuable insights and solutions for enthusiasts and professionals alike.