Ditto on the Motorcraft filters--I use dual FL1A's and the work well and are readily available. I use Red Line
Synthetic. VERY pricey, but it will not sludge or breakdown and is ok for longer intervals. they also make a great product called Water Wetter to help control temps @ track or on hot days. I think Pep Boys still sells Water Wetter, but buy Red Line
oil on line.