If you have a high milage engine and want to switch to a synthetic oil such as AMSOIL there are no special requirements; however, in older vehicles or those with high mileage, it is advisable to use AMSOIL Engine Flush first. This will ensure that the engine is clean and free of any accumulated contaminants which might have an effect on the service life of AMSOIL Motor Oils. In all cases, it is good judgement to install a new AMSOIL Super Duty Full-Flow Oil Filter (SDF) every time you change oil.
It is a really good idea to make the switbh to Synthetics as sson as you can to reduce the wear on that engine and extend its life..
