See also:

Engine
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Materials Added To Engine Oil
Do not add any supplemental additives, other than leak detection dyes, to your engine oil. Engine oil is an engineered product and its performance may be impaired by supplemental additives. ...

Engine Oil Filter
The engine oil filter should be replaced with a new filter at every oil change. Engine Oil Filter Selection The manufacturer’s engines have a full-flow type disposable oil filter. Use a filter ...