March 6th, 2013, 06:40 PM
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Senior Member
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Join Date: Jan 2013
Location: Rohnert Park, ca.
Truck: 1968 KM2500
Posts: 1,326
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Rep Power: 421
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Re: Newer Oils in Older Engines
I'm using Rotella 15w-40 in my 478M as the breakin oil and I think I'll continue using this oil for good. Pete Chronis Northern Cal. 68 GMC KM-2500 478M V6
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