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- #76
Actually the oil from the factory (in the hybrid) is 0w-20, nothing special and not break-in oil. It would make sense that you use it your engine builds, but Ford’s not using it in regular passenger vehicles. If anything the procedure would be to run at light to moderate load for a few hundred miles and change, but there’s no mention of that in the book and the dealer said stick to the manual, even for the first one.Sorry but I am pretty sure that you need to use regular oil for the first 10,000 miles to allow the rings to seat properly. I have built a lot of motorcycle engines and after putting synthetic in from the start on a couple I have witnessed that the rings don't seat with synthetics properly. After the first 500 mile I always changed to synthetics. In automobile engines, unless you are racing it and really scrubbing the rings, 10,000 miles is about where the rings have seated and you will get the best of the synthetics and you won't get oil blow by because the compression ring hasn't seated.
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