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You will hear alot of people tell you different things about oil
follow the manufactures recomendations. The pay engineers millions of dollars to figure this stuff out. Follow what the owners manual says and you will be fine
Oil never looses it lubricisity (SP) oil gets contaminated as a by product of hydrocarbon emmisions that a internal combustion engine creates. Oil will always lubricate.
I dont believe in changing transmission fluid on a auto....but thats just me most people will disagree with that statment. To each his own.
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