On June 1st I bought my wife the van with around 62000 miles on it. I immediately changed the oil with Motorcraft 5W20 syn blend and a Motorcraft FL400S filter. I decided to run a 5000 mile OCI. Well, that 5000 miles will be up this weekend. The van hasn't used any oil at all. Thanks to the PP Walmart rebate I picked up 2 jugs of PP 5W20 even though I already had two more jugs of Motorcraft in the garage. I plan on running the PP & Motorcraft filter for this OCI. My wife drives about 75 miles round trip daily to work...about 70 of the miles are all Interstate. How long of an OCI would you recommend running the PP/Motorcraft filter combo? I'm thinking 7500. Thoughts/Comments????