The car industry has technical terms, which might be confusing to the Average Joe, like "viscosity" and "flow rate." Are these the same thing? Do conventional and synthetic oils have the same viscosity?

The oil viscosity is actually the 5W30 or 10W30 terms, which you see on your bottle. You will note that for each of these viscosity levels, you can choose from conventional or synthetic oil blends. This means that conventional and synthetic oils can have the same viscosity. So what is the difference between the two oil blends?

The actual difference between conventional and synthetic oils is the "flow rate." Some might confuse the two because "viscosity" is so "fun to say." The thickness of new conventional and synthetic oil is quite similar. On the other hand, the thickness of the used oil is quite different. Therein lies the rub. Bring your vehicle in for an oil change.
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