[AUTOMENT] What do the numbers on my oil bottle (like 5W-30) actually mean?

The numbers describe the oil's Viscosity Grade—how thick or thin it is at different temperatures. 75% of engine wear occurs during the "Cold Start" (the first 10 seconds of turning the key). If the oil is too thick when cold, it can't reach the top of the engine fast enough to lubricate the moving parts.

• The "5W": The 'W' stands for Winter. The lower this number, the thinner the oil is in cold weather (good for fast starts).

• The "30": This is the viscosity at $100\text{°C}$ (operating temp). It needs to be thick enough to provide a protective "film" but thin enough to not cause drag.

Why Synthetic Matters:

Unlike conventional oil, Full Synthetic oil is engineered to have a "Stable Molecular Structure." It stays liquid at freezing temperatures and doesn't break down (turn into sludge) under extreme heat. At AUTOMENT, we recommend synthetic for any modern engine to ensure maximum protection.

Use Case: Essential for owners of high-performance or newer vehicles. Using the correct viscosity and switching to synthetic ensures your engine remains "quiet" and powerful for the long haul, preventing expensive internal repairs down the road.