Synthetic oil
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MC Oil
Why is it that Motorcraft oil is not in the top three of desired oils? I use MC 5W-20 in my '03 Sable and it returns outstanding UOA. I am expecting the same with MC 15W-40 for my truck too.
Today I'm changing oil for the first time in my '05 F-350 with MC 15W-40 at the dealership. It is my understanding that this is the best oil for the 6.0L. Why? Ford service told me it's because MC has more anti-foaming addidtives.
I have read (somewhere) that the factory fill is 10W-30 for break-in and that you should leave it in for the full OCI. I have 4893 miles with heavy towing for 2500 miles.
Now, what I find funny with all of this is: Some say that MC 5W-20 is too thin and is used only because of CAFE. Others say that MC 15W-40 is too thick. But both groups both agree that they know more than Ford on what is best....lol
Today I'm changing oil for the first time in my '05 F-350 with MC 15W-40 at the dealership. It is my understanding that this is the best oil for the 6.0L. Why? Ford service told me it's because MC has more anti-foaming addidtives.
I have read (somewhere) that the factory fill is 10W-30 for break-in and that you should leave it in for the full OCI. I have 4893 miles with heavy towing for 2500 miles.
Now, what I find funny with all of this is: Some say that MC 5W-20 is too thin and is used only because of CAFE. Others say that MC 15W-40 is too thick. But both groups both agree that they know more than Ford on what is best....lol
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nufan4ever
6.0L Power Stroke Diesel
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08-20-2014 12:07 PM