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As the engine wears, the bearing clearances become a little larger, REQUIRING that you use a higher viscosity oil to maintain oil pressure. If using the recommended oil viscosity results in low oil pressure, you should certainly switch to the 10W40.
HOWEVER, if the engine can maintain oil pressure using the recommended oil viscosity, you will get better economy and the engine will perform better.
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∙ 12y ago
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What transmission fluid to use in l300 2001 Saturn How much to use?
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carbertor
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5w15
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All model years use R134a - the car entered production in 1999, well after R134a had become mandatory.
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