Chrysler 300: Poly Blend

Q--My Chrysler 300 with the 3.5-liter engine holds six quarts of oil. Would it be a good idea to make one of the of the quarts synthetic oil?

A--I don’t think substituting one quart of synthetic will make much of a difference. In my opinion you need to go with at least a 50/50 blend. Better yet, make it 100-percent synthetic.

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