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Re: Changing Oil Viscosity: Myth or Fact?
Posted to Technical Theory Forum on 9/4/2007 2 Replies

I'll take tech A

Many Ford engines were switched from SAE 5W-30 to SAE 5W-20 without any problems. Those that paid close attention actually saw a decrease in oil consumption with the thinner oil.

SAE 5W is a separate rating from SAE 30. When an oil meets b... Login to read more.

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