What is engine oil viscosity? A Quick Guide (what is engine oil viscosity)
Ever walked down the oil aisle and felt a little lost staring at all those numbers on the bottles? You're not alone. Those numbers, like 5W-30 or 10W-40, all come down to one crucial thing: engine oil viscosity. Simply put, viscosity is a fluid's resistance to flow—or, more plainly, its thickness. It’s the single most […]
