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

sorry, '05...big 4 door with a Northstar.

Yes, it was the new "E" filter. The endcaps are fiber, instead of steel. I'm not necessarily buying the whole "steel end caps are better" thing because I think it's easier to glue 2 fibrous materials together and get... Login to read more.

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