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Old Apr 4, 2011 | 06:41 AM
  #9  
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rich123
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From: north wales
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the silk 10/w50 pro starts working at 100 and rated to 170 so if your hiting 110+ i'd be using something like that
either
castrol 10/60
total 10/50
or silk 10/50

all are rated to high temps
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