At 258k miles, Ive finally decided to go the HPL route on my 2012 3.7 F150. Right now I have Motorcraft semi syn 5w30 with 3k on it in the sump. I usually run it 5k. I was thinking of draining a quart, adding a quart of HPL EC and run it 2k miles till I hit 5k then changing it with HPL 5w30 PCEO and do 8k ocis from here on out with oil analyses. Sound plan or should I do it differently with the EC?