Don't Delay

It is important not to postpone an oil change. If the oil change has been neglected or delayed, the oil becomes a thickened, gritty, black or very dark brown fluid. The oil will be opaque and the dipstick markings cannot be read through the oil. It contains too much dirt or combustion byproducts and will not absorb any more.

USED ENGINE OIL
USED ENGINE OIL

Furthermore, it does not flow well in a dirty, thickened condition. Dirty oil plugs passages and prevents part lubrication; the engine could fail from heat buildup. Dirty oil also accelerates part wear, like on bearing surfaces. In short, an overlooked oil change prevents the oil from doing its job. Do not skip or postpone your oil change.

At the same time, be careful not to change your oil too frequently. During the course of monitoring your engine oil's level and condition, do not judge the need for an oil change based solely upon the appearance of the oil. Dark brown oil is not necessarily ready for a change. Modern detergent and dispersant additives cause fresh oil to turn dark quickly; this is proof that the additives are keeping contaminants suspended. Rely more upon your maintenance records to determine when your next oil change should occur.


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