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Re: Synthetic Motor Oil: Extended Drain Interval - or Not?
Posted to Castrol Forum on 1/26/2017

This was the first oil change for this vehicle(Brand new). Owners manual calls for 5w30-we used Motorcraft 5w30 synthetic blend-I would expect that's what came from the factory, but who knows. As far as driving, she travels 8.5 miles each direction daily, from... Login to read more.