Viscosity indicates the oil’s ability to flow at certain temperatures. A lower viscosity flows at a faster rate than a higher viscosity oil. A multi-grade bottle of oil provides you with two viscosity levels to accommodate your engine’s needs at both ends of the temperature spectrum.

A bottle of multi-grad oil shows two numbers separated by a W. In 5W30, for instance, the first number, 5, tells you that’s the maximum viscosity the oil will reach when either the weather or the engine is cold. It should be a thinner weight, so that it can flow through the parts more quickly. The W means winter. The second number, a 30 here, represents the viscosity range when the engine or weather is hot. It needs to be viscous in order to maintain its properties during warm conditions.

We would welcome the opportunity to answer your questions. Stop in to our service center at Bill Summers Ford LLC when you’re in the North Platte area.

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