Thread: Backdraft book says use 20w50 oil
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Old 07-17-2014, 05:43 AM
genolan genolan is offline
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Join Date: Sep 2013
Location: Sparta, nj
Cobra Make, Engine: Backdraft 1048
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BXX1 this makes sense can anyone give me a reason not to switch to Mobile 1 0w 40 from Castrol 20w 50. I have roller rockers but have no idea on bearing clearance. I took the car for a hard run last night and noted the pressure at idle 900rpm before (65PSI) and after (25psi)
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Gary
Backdraft 1048
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