I am going to do the first oil change using Ford Semi-sythetic blend at 2500. Then the 2nd oil change at 5,000 using Mobil 1. After that it will either be every 5,000 or 7,500 depending on oil usage and how it looks. I drive 350 miles a week for work (70% highway) so the miles will add up fast.
I would never extend oil to 10k miles ESPECIALLY on the first oil change. Remember, that intial oil was in there when all the metals first got to meet each other.
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