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Yes, I know this seems hard to believe, but Kirkland full synthetic lacks the required Ford WSS-M2C962-A1 specification that is in your owners manual. WSS is a Ford specific requirement and putting the wrong oil, even if it is the right viscosity could void your warranty. Do you have to use Motorcraft, no, I use Mobil 1. Use what ever brand you like just look for WSS. Fir semi syn the speciation is WSS-M2C963-A1.
DonāT believe me, check out the packaging on you next Costco visit.
DonāT believe me, check out the packaging on you next Costco visit.
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