Keeping engine within the 6 month OCI as required by the warranty which will expire at 60,000 mi; following the end of the warranty, I will be more than willing to extend the OCI in terms of both milage and time. This change was run though a K&N HP-1004 which is what I threw on again for the current fill, only now giving PP 0W-20 a try. Slightly concerned with the Mobil thinning out at operating temp to 6.98 cSt, though this is still in spec for the weight, so not too worried.