5 Car Myths Debunked by an Automotive Expert

Prefilling Oil Filters: A Harmful Myth

• 💡 Prefilling your oil filter before an oil change is a myth that can actually be harmful to your engine.
• ⚠️ Modern cars have rapid oil pumps and systems like turbos and variable valve timing that rely on immediate oil pressure.
• ❌ Introducing non-filtered oil during prefilling can contaminate the engine, and many manufacturers advise against it.
• 🛠️ Modern oil filters are smaller and designed for rapid pressure buildup, making prefilling unnecessary.

Transmission in Neutral at Lights: A Misconception

• 🚦 Putting your transmission in neutral at traffic lights is a myth that can cause unnecessary wear and tear.
• 🌡️ While it slightly elevates transmission temperature (3-4°), it remains within the normal operating range and is not a cause for overheating.
• ⚙️ Repeatedly shifting between neutral and drive causes extra motion in powertrain mounts and repeated clutch engagement/disengagement, leading to premature wear.

Old Cars vs. New Cars: Safety Myth

• 🚗 The myth that old cars with solid steel are safer than modern cars is dangerous and false.
• 💥 Modern cars are designed with crumple zones that absorb impact energy, protecting occupants by crumpling themselves.
• 🛡️ The goal is for the car to sacrifice itself to protect the occupants from the impact energy, not to remain undamaged.

Ultra Low Mileage Cars: A Risky Investment

• 📉 Buying an ultra low mileage car that is many years old is a dangerous myth.
• ⏳ Age takes a greater toll on cars than mileage; components can deteriorate from sitting unused.
• 🔍 These cars may hide catastrophic issues due to age-related component failure, making thorough inspection crucial.
• 🚗 Cars are meant to be driven and maintained, not just parked.

Alternators and Dead Batteries: A Maintenance Myth

• 🔋 Refusing to replace a dead battery and relying on the alternator to charge it is a myth that can damage your alternator.
• 🔌 Modern alternators are maintainers, not primary chargers, and are designed to power electronics and maintain a healthy battery.
• ⚠️ Running an alternator at maximum capacity with an unhealthy battery, or idling the car to charge, can lead to alternator failure.
• ✅ If a battery fails a load test, it should be replaced to avoid further damage.