Wal Marts are starting to stock 0w-20 and 0w-40 in addition to 0w-30, 5w-30, 10w-30, & 15w-50. The price for the 0w-x oil's is near $5/qt where I live.

Synthetic oils generally have a mild ablility to SWELL seals and I disagree with the notion that 5000 mile oil changes are good for both synthetic and conventional. Synthetic oils will hold up better over time.

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Brian Toscano