20W-50 is a common motor oil used in moderate-to-large diesel and gasoline engines, high-performance motorcycle bikes, and aviation vehicles.
Its resistance to thinning at high heat also makes it popular as a racing oil and high temperature driving.
Exposure to very hot temperature settings can cause most oils to break down. SAE 20W-50 oil is made for engines that reach extremely high temperatures to lubricate various car parts like the piston against friction and prevent varnish deposits and engine sludge.
When used in appropriate engines, it’s a far better sealant than a thinner oil like 5W-40. It provides adequate cushioning, which protects the engine parts against friction. As a result, it extends your engine life and prevents engine wear.
However, keep in mind that 20W-50 is a thicker oil that is only recommended for certain vehicles.
Always refer to your manufacturer’s manual and speak to your mechanic before switching to a heavier oil for your car.

The 10W-30 viscosity has all but disappeared as a primary recommendation for vehicles except for certain diesel engines, and today serves as a viscosity alternate choice.
Many manufacturers have transitioned to 5W-30 motor oil viscosity, and 5W-30 or 0W-30 oil can be used in applications requiring a 10W-30 grade motor oil.

We offer a variety of Nextol™ 10W-30 viscosity motor oils, including products designed for high mileage vehicles, and for those of you looking for an extended drain motor oil.

What do the numbers in 10W-30 mean? The numbers refer to the weight and thickness, or viscosity, of the oil. Motor oil gets thicker when it’s cold and thinner when it heats up. The first number indicates the viscosity of the oil at a cold temperature, and the second number indicates the viscosity at operating temperatures.

Compare to see different levels of protection these products offer and choose the one that meets your needs.