Last year I purchased a 2016 F150 5.0 with 228,000 miles. It started idling poorly in warm weather. It’s commonly the VCT solenoids at issue with this problem. Here’s what I found after 200,000 miles of 10,000 mile oil changes. It does hold almost 8 qts. I believe it was mostly MC Synthetic blend. It’s been running perfectly since the solenoids. I just completed a 3,000 road trip. It returned 18-19 mph and used 1 quart of 0w40 PP over 6,500 miles. The truck currently sits at 243,000 miles.