Originally Posted by novus
So I've read in here that Mobil1 isn't true synthetic. I've been using it for some years now in my truck. If this is the case, what is recommended? I also see people running 5W-20. I haven't ran out to the car to grab the manual and read, but I will soon. But back to the main question, what's the recommended oil? Motorcraft?
Ford will tell you Motorcraft, but in reality, you only need to meet or exceed the Ford specification WSS-M2C945-A. For warranty purposes especially, you want to make sure of this - there would be few things worse than getting a warranty claim on an engine denied because a non-approved oil was used.
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