At what milelage should i motor flush my 2014 chevy impala?
don't flush it for another 2 year
If you are talking about engine flushing you won't ever have too as long as you change the oil and filter regularly and stick too it. Cooling systems should be done at least every 2 years but that is depending on what type of coolant you are running, some of those can go as long as 4 years as long as the PH is maintained at proper levels.
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