That's a question open to an awful lot of opinion. In MY opinion, I doubt any particular type or brand matters in this application. Want to run cheap Dino oil? Run short ocis.. The 3v Ford isn't really tolerant of long ocis, so short is the name of the game... Maybe the 1st owner ran 5k on conventional?? You could run a premium syn longer, but (again imo) probably not as long as could be done in a different engine.In your opinion does the type of oil came into play here? What I mean is that maybe a cheap oil was used in this vehicle, and maybe things would be different if a good oil like Mobil 1 or Pennzoil Ultra Platinum was used?
On the other hand... This thing made it at least 190k on whatever 1st owner put in... How bad of a job could he have done?
Im not arbitrarily a short or long oci guy.. The truck as mentioned is on 3 to 5k intervals on Napa sun, my wife's aviator with the 4v 4.6 is 10k on Mobil 1 EP and my beater Honda is on... Whatever/Whenever.