
AMSOIL engineers lubricants to maximize performance and protection in a wide array of vehicles.

Prior to the introduction of multigrade oils, the method to maintain proper viscosity year-round was seasonal oil changes.

Quality lubricants are key to guarding against wear and keeping vehicles running for the long haul.

When extreme loads break the lubricant film, metal-to-metal contact occurs, increasing friction and heat.

The accumulation of contaminants and chemical changes in the motor oil eventually make it unfit for further service.

You don't need to do anything special before you switch to synthetic oil after having used conventional oil.

Spring and fall constitute “oil-change season” for many, but that schedule is more tradition than a maintenance imperative.

While it's safe to mix synthetic and conventional oil since they're compatible, here's why it's best to avoid it.