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1992 spider S4
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Discussion Starter · #1 ·
guy in auto parts store said 10 w 40, but I saw somplace on the web 15 w 50. make a big difference? as I already put 10 w 40, I can drain it, but rather not.
 

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For the S4 Spider the 10W40 is fine.
Not sure there is a 15W50......(15W40 yes, 5W50 also)
In any case will NOT make a big difference.

Elio
 
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