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Shell Oil Motor Car Lubricants API Sj SAE 5W30 10W30 10W40 15W40 5W30 Engine Oil Semi Synthetic - China Gasoline Engine Oil, Shell Oil | Made-in-China.com
My car runs with 5W-30 oil full synthetic, the auto store guys want me to put in a thicker 10W-30 oil, because of the summer “heat”, is this correct? - Quora
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