Have a 2013 SEL 3.5 with about 110,000 MI, I bought it with about 89,000 miles, it was always serviced at the dealer, with Motorcraft synthetic blend. I use that for the first couple oil changes, then I switched over to Valvoline Maxlife, I've been considering switching over to a synthetic. I don't drive much, maybe 5,000 mi a year. If that. Mostly around town driving, occasionally make some long distance trips with it.. but I always change my oil twice a year. What do you guys recommend in the way of oil. If it wasn't for this internal water pump I would probably stay with what I have been using. Thanks ?