Extreme temperatures pose a host of challenges to lubricants. On hot summer days or when towing and hauling, extreme heat can deplete the oil additives sooner, altering the oil’s chemistry and preventing it from lubricating, cooling and protecting as designed. Sludge can form, which clogs narrow oil passages and prevents oil from reaching vital components, causing wear.
Heat can also cause motor oil to evaporate, or volatilize, creating deposits on the intake valves, which impede airflow into the engine and contribute to poor sealing of the combustion chamber. This can lead to rough idle, misfire and reduced power and fuel economy. When oil volatilizes, the lighter molecules evaporate, leaving behind the heavier components. This leads to viscosity increase, which makes the oil more difficult to circulate and reduces fuel efficiency. You may have experienced this when your car “uses” oil and requires frequent top-offs. Volatilization also creates emissions that contribute to air pollution.
Cold weather poses additional challenges. As the temperature drops, paraffins, or wax, present in conventional lubricants cause the oil to thicken and solidify. Oil that has thickened doesn’t flow as readily at startup, increasing the likelihood of engine wear. In extreme cold, lubricants can thicken enough to prevent the crankshaft from turning fast enough to start the engine, leaving you stranded and in need of a jump start.
AMSOIL synthetic lubricants provide improved extreme-temperature performance compared to conventional lubricants. They are engineered in the lab to have uniform molecular shapes and weights, which increases stability in the presence of extreme heat. Their durable molecules also provide improved resistance to chemical breakdown, deposits and sludge.
Unlike conventional lubricants, AMSOIL synthetic lubricants don’t contain paraffins, meaning they remain fluid in sub-zero temperatures. Their advanced synthetic chemistry results in significant extreme-temperature benefits compared to conventional lubricants, including the following:
• Maximum wear protection • Superior engine cleanliness • Less-frequent top-offs • Longer service life • Easier cold starts