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Grist
Oct 23, 2014, 7:03 am18 ptsQ. My new car requires synthetic oil. Rather than change every 5,000 miles, I can go 7,500. Each oil change is a higher cost, but it nearly averages with fewer changes. I use less oil and fewer filters, but what about the overall manufacturing pollutants and carbon footprints of the two oils? D.H.Wichita,…
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