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post #4 of (permalink) Old 09-05-2018, 01:29 PM Thread Starter
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Location: detroit, michigan
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Originally Posted by bismic View Post
Did you really mean a 15W-20 blend?

If so, get that oil out of there and change to a synthetic diesel rated CI4, CI4+ or CJ4 5W40 oil or a 10W30.

Also, if you really did mean it, post a link to the oil.
Yes Motorcraft Super Duty Diesel synthetic blend. Oh Shoot~ it is a 15W-40 not 15W-20! DUH! I talked to my part store guy with your concern. He ordered up Amsoil full synth diesel 10W-30 for me.
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