Wondering where I can get the product data spec sheet on it. you know the VI, visc, TBN etc. for the current 15w40 CJ-4/SM motorcraft. Would really like to see it... haven't been able to find it anywhere.
On a 2nd note, I guess M.C. came out with a 5w-40 as of Jan 08... spec sheet on that by chance? I'm debating switching from the conventional 15w40 to a 5w40syn. but the owner's book for the 6.0 doesn't spec it. the book for the 6.4 however, does spec the use of 5w40 in hot climate. Not sure why it's "approved" for the 6.4, but not for the 6.0.
On a 2nd note, I guess M.C. came out with a 5w-40 as of Jan 08... spec sheet on that by chance? I'm debating switching from the conventional 15w40 to a 5w40syn. but the owner's book for the 6.0 doesn't spec it. the book for the 6.4 however, does spec the use of 5w40 in hot climate. Not sure why it's "approved" for the 6.4, but not for the 6.0.
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