whats better oil. fords 5w20 or a synthetic 5w30?

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I guess you should go with what the owners manual recommends. For Fords, think they recommend 5W-20. If you want synthetic you could get the Mobil 1 0W-20 or the Castrol 5W-20.
 
If you go for a "true" PAO/Ester synthetic or a quality blend such as Schaeffer's they will be better oils at 2+/- times the price. If the synthetic is a Group III then I don't think you'll see much improvement over the Ford spec'd oil, espcially with the Motorcraft or Pennzoil 5W-20. And of course the price will substantially more. If you're changing oil every 3,000-5,000 miles is it worth it to go with a more expensive true synthetic oil. That's up to you. Whimsey
 
Jumping in here.... I am sure its a matter of opinion but in Full synthetic Castrol or Mobil 1?
 
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