Use 10-30 Motorcraft. Takes about 1000 miles for mine to stop. Everytime my turbo have blown it didnt have motorcraft 10-30
Not a huge difference, but it was enough to notice on the highway.Just speaking on the fuel mileage portion of your post. I cant believe that the difference between one oil and the next is enough to reflect in a increase or decrease of fuel mileage. It would have to be so slight that most people would never notice the difference. That being said, I will be switching to motorcraft at my next oil change.
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