How multigrade oil changes viscosity @TheRepairSpecialist

Uploaded February 2024 | Updated September 2026, 1 week ago

Imagine that multigrade oil has the ability to adjust to various weather conditions, much like a superhero.

In cold weather, such as on a wintry morning, the oil behaves as a thin liquid, nearly identical to water. Because the oil flows smoothly and rapidly, providing lubrication even in freezing conditions, this makes it easier for your engine to start. This is the lower number viscosity, or "winter" viscosity.

Now, the oil turns into a thicker liquid, like honey, when it gets heated, like on a sweltering summer day. By creating a stronger lubricating layer, this thicker shape shields your engine from the rising temperatures. This viscosity represents the "summer" or higher number.

Multigrade oil is therefore equivalent to having a superhero oil that can be thick in the heat to protect your engine when it's working hard and thin in the cold to start your engine quickly. It's similar to dressing appropriately for various weather situations!

Have a great day

Craig (Owner and creator of The Repair Specialist Channel)

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