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straight weight vs multi-weight oil - 331

Started by bullet bob, August 01, 2015, 06:57:10 AM

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dadscad

#20
August 04, 2015, 02:50:18 PM
Gary is correct. A 0-30, 5-30, or 10-30 oil is a 30wt oil at operating temperatures. The only difference is the flowability at cold start up. A 0-30 will reach vital parts quicker than a 10-30 on cold starts. Until the federal mandate to reformulate the zinc and phosphorus, I used Amsoil 0-30 in my 63. I now use Amsoil 5-30 diesel/gas engine oil that has the correct amount of zinc and phosphorus in the additive package.
Enjoy The Ride,
David Thomas CLC #14765
1963 Coupe deVille
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