Imagine turning the key in your car's ignition, only to be met with complete silence. The engine has seized—locked up like a heavy shackle, rendering the vehicle immobile. Among DIY mechanics, a persistent myth suggests that simply adding oil can miraculously revive a seized engine. But does this approach hold any scientific merit? This article examines the true causes of engine seizure and outlines proper response strategies.

First and foremost, adding oil cannot resolve an engine seizure. This severe mechanical failure typically results from catastrophic internal damage, such as:

• Piston seizure against cylinder walls
• Bearing failure and metal fusion
• Crankshaft or connecting rod damage

These conditions create physical interference that prevents engine components from moving. Oil cannot repair fused metal surfaces or restore dimensional integrity to damaged parts.

When facing a suspected seizure, technicians should:

• Attempt manual crankshaft rotation (failure indicates mechanical binding)
• Inspect visible components through oil fill ports
• Check for metal debris in oil (indicative of severe wear)

A comprehensive evaluation of the lubrication system is essential:

• Measure oil pressure (low pressure suggests pump failure or blockage)
• Inspect oil passages for obstructions
• Verify proper oil viscosity and quality

Oil starvation often precedes seizure events, making lubrication system integrity critical for prevention.

Regular maintenance significantly reduces seizure risk:

• Follow manufacturer-recommended oil change intervals
• Use specified oil viscosity grades
• Monitor oil level and condition between changes
• Address unusual engine noises promptly

Once seizure occurs, professional assessment determines the appropriate course:

• Repair: Requires complete disassembly, parts replacement, and cylinder refinishing
• Replacement: Often more cost-effective for severely damaged engines

Engine seizure represents a complex mechanical failure that demands professional intervention. While proper lubrication is essential for prevention, adding oil cannot reverse existing damage. Understanding these realities helps vehicle owners make informed decisions about maintenance and repair.