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Re: Synthetic Motor Oil: Extended Drain Interval - or Not?
Posted to Castrol Forum on 1/27/2017 2 Replies

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2006? I presume you mean DTS, or if DeVille it was an older Cadillac. Anyway, was this the "new" E-core" design (designated with an 'E' after the standard Delco part number)? I'm curious if you thoug... Login to read more.

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