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Auto Q&A with Tom Torbjornsen: Follow recommendations for oil and filter changes

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Dear Tom,
I own a ’92 Olds with 94,000 miles. I have heard that it is not good to use high-mileage oil because it will clog up the seals. Now they have come out with full synthetic 5W30 high-mileage oil. Can I safely use this in my engine? Thank you and keep up the good work.
Bill from Orchard Park, N.Y.

Bill,
There is a seal conditioner blended into high-mileage oil that causes old seals to soften and swell. This tends to temporarily stop oil leaks due to hardened seals. The problem? The conditioner rarely lasts very long resulting in leakage again. Keep following the manufacturer's recommendations for oil and filter changes and you will realize high mileage from this engine. There is no need for high-mileage oil.
Tom

Tom Torbjornsen is an automotive expert of 37 years. An automotive journalist in good standing with the IMPA (International Motor Press Association) and MPG (Motor Press Guild), Torbjornsen is the Repair and Maintenance Editor for AOL Autos, At Home Portals and many other websites. Please send your car questions to his website at www.americascarshow.com.

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