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Originally Posted by CJ_Boxster
I use 10w40, its no longer recommended by porsche but it was on the approved oils list at one time. Ummm well i dont know what the Mobile1 costs but my RP is about $5.65 a quart.
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WOW, that's cheap for RP. Red Line is over $9/quart now. Mobil 1 is getting close to $7/quart now.