Two weeks ago I purchased an '07 Focus SE 2.0 Duratec. The next day I changed the oil and put in Pennzoil Ultra 5w-20 and a Motorcraft filter. So far, 600 miles into the OCI, I like it. Of course, I have nothing else to compare the Pennzoil Ultra to, since this is my first OCI with the car. But even on mornings in the low single digits, I get no startup tick or anything (besides the notorious Duratec injector noise)
So I'm pretty pleased, and I plan on doing 7,500 mile OCI's. Ford recommended 5,000 mile OCI's for my year Focus, but the very next year, they bumped the '08 model to 7,500 miles with no changes to the engine/oil filter size at all (except drive by wire and some ECU tuning I'm sure). I've never tried any "exotic" oils before, and I was looking for some recommendations for my next OCI. I'm also considering 0w-20 if I can find some for a reasonable price.
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