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AMSOIL FAQS


Can synthetic oil be used in new engines?
Answer: Yes. Synthetic oil is perfectly safe for use in both new and high-mileage engines.
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Must new cars be broken in using petroleum oil?
Answer: No. AMSOIL synthetic motor oils can be safely used during break-in. In fact, many vehicles, including the Dodge Viper and Chevrolet Corvette, are factory-filled with synthetic oil.
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Why is there an hours limit in addition to time and mileage limits on AMSOIL synthetic motor oil’s service life?
Answer: No matter how well motor oil is formulated, it won’t last forever. As the miles accumulate, motor oil begins to degrade and lose its lubricating effectiveness, while the additives are depleted. Severe-service driving conditions accelerate this process. Even with little mileage on the oil, oxidation, gases and moisture take their toll and start the degradation process, making it necessary to set both a mileage and time limit with oil change intervals. Excessive idling, common with fleet vehicles, puts additional stress on the oil, making it necessary to set an hours limit for vehicles subjected to excessive idling. Motor oil and vehicle manufacturers have developed general recommendations for the maximum amount of time or miles that the oil can be used; typically these intervals fall between 3,000 and 7,500 miles, depending on the type of service.

Many AMSOIL synthetic motor oils are specially formulated for extended drain intervals, providing maximum protection longer than other oils. Check the product data sheet for specific recommendations.
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Will synthetic motor oils cause engines to leak oil?
Answer: No. Synthetic oils do not cause engines to leak oil. In fact, AMSOIL synthetic motor oil is fully compatible with modern seal materials and is properly formulated to condition seals, keeping them pliable to prevent leakage.
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Can AMSOIL motor oils be mixed with other brands?
Answer: Yes. AMSOIL synthetic motor oils are compatible with other conventional and synthetic motor oils. Mixing other oils with AMSOIL motor oils, however, will shorten the oil’s life expectancy and reduce its performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed. Mixing other oils with AMSOIL motor oils will also void the AMSOIL limited warranty.
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Why are AMSOIL synthetic motor oils capable of extended drain intervals?
Answer: AMSOIL synthetic motor oils are formulated using premium synthetic base oils, and the highest-quality additives, that provide extended-drain capabilities. AMSOIL synthetic motor oils achieve greater cleaning powers, while providing better equipment protection over longer oil drain intervals. The unique synthetic formulation and robust TBN retention of AMSOIL synthetic motor oils work to resist oxidation and neutralize the acids that shorten the service lives of other oils. Their characteristic resistance to high-temperature volatility (burn-off) helps reduce oil consumption, while maintaining viscosity over longer periods of time than other oils. Check the product data sheet for specific recommendations.
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Will AMSOIL motor oils decrease oil consumption?
Answer: AMSOIL synthetic motor oils can reduce oil consumption in mechanically sound engines. However, AMSOIL synthetic motor oils cannot fix engines that consume oil due to mechanical problems.
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Is there a recommended procedure for changing to AMSOIL synthetic motor oil?
Answer: There are no special requirements for changing to AMSOIL synthetic motor oil. However, in older vehicles with high mileage, it may be advisable to use AMSOIL Engine and Transmission Flush first. This will ensure the engine is clean and free of accumulated contaminants that may affect the service life of AMSOIL synthetic motor oil. Installation of an AMSOIL Ea Oil Filter at every oil change is also recommended.
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How do AMSOIL synthetic motor oils compare to other motor oils?
Answer: The importance of using good-quality oil in an engine cannot be overstated. AMSOIL synthetic motor oils consistently outperform conventional and other synthetic oils in virtually every category of performance, including wear protection, extreme high- and low-temperature performance, foam control, viscosity retention, rust and corrosion protection, volatility and fuel economy. While other brands may provide good performance in some of these areas, AMSOIL synthetic motor oils consistently perform at the top in every category. Drivers can have confidence knowing that AMSOIL synthetic motor oils provide maximum performance and protection.
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What are "normal" and "severe" driving conditions?
Answer: Each vehicle manufacturer defines "normal" and "severe" driving conditions for its equipment; AMSOIL recommends owners check these definitions in their owner's manual to determine the service condition in which they typically drive.

AMSOIL defines normal service as personal vehicles frequently traveling greater than 10 miles (16 km) at a time and not operating under severe service.

AMSOIL defines severe service for gasoline engines as conditions that include commercial or fleet vehicles; excessive idling; or frequent towing, hauling, plowing or driving in dusty conditions.

AMSOIL defines severe service for diesel engines as extensive engine idling, daily short-trip driving less than 10 miles (16km) or frequent dusty-condition driving.