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Old 09-10-2011, 07:58 PM
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99F150
99F150 is offline
Fleet Mechanic
Join Date: Aug 2002
Location: Sioux Falls SD
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Thanks for the replys. The oil has a bright yellow color to it, shows up on stick and the fill cover. I am also curious about the spec. My ownersmanual is the second printing July 2011 and it shows the old spec WSS-M2C929-A instead of the current 946.
Also the book recomends 5000 mile changes for severe and 7500 for normal.

If it is just the Motorcraft blend 5W30 with a yellow dye I will probley change at 2500 miles. If it is a special oil I will leave in for 5000 miles.