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SF Zombie hunter
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2,557 Posts
Discussion Starter #1
i have a box full of castrol synthetic 5w-50 in my room is been like 4months since my last oil change i was wondering if i can still use that. If not i gotta get my self some more oil for the oil change this time.
 

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Premium Member
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4,409 Posts
i ran that last summer, not very good oil IMO but itll do.
 

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SF Zombie hunter
Joined
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2,557 Posts
Discussion Starter #4
i heard ppl get rod knock after they switch from normal oil to sythetic, do i have to flush the system or something before i put the oil in?
 
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