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Does Royal Purple make a 0W40 and why did you go up to the 5W40? The 5W is for winter protection, right? Does 5W and 0W make a difference?
Jmatta,
Where in chicago-land did you pick up Royal Purple and how much per quart?
-Steve
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2001 Boxster S
Desnorkled
Pioneer Avic D3
JL Audio 6.5 inch subs (in the door)
Pyramid 4 channel amp
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