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I had same issue except, I have 2001 FSXT. I was the the shore and needed to top off but the only oil available was 10W30. I added 1/2 qt. Was also told to get oil change. Whats the verdict?
From a 36-year mechanic: Run it 5k miles then change & you're good to go. Oil can be as simple or as crazy as you want to make it...
As for topping off with 1/2 qt 10W-30, same advice.
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