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Every time I remove the recommended 5W20 from an engine and redo the O&F to 5W30, I could swear it makes a difference.
SMooooother, quieter for sure.
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162 Assault Helicopter Co,(Vultures ) D troop 3/5 Air Cav. ( Bastard CAV) South of Saigon, U Minh Forest, Delta, and most parts in between.
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