SWITCHING OILS IS NO BIG DEAL

 
BY TOM AND RAY MAGLIOZZI
Published: December 12, 2011

Dear Tom and Ray:

I have a 2009 Nissan Cube . I take the car to the dealer for oil changes. I always use synthetic, but at the last oil change, they put in regular oil by mistake. I drove the car for 3,000 miles and then asked them to put in synthetic oil. Now my husband says that I have "ruined" the engine by switching the oils back and forth. Is this true? He says that I immediately should have asked them to d...


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