oil weight
Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
You have to look at API certification, it must be CI4+ diesel oil for the 6.0. Make sure you look at your manual. Gas engine oil will not cut it. 5w30 is a gas engine oil. The 6.0 works the oil hard, so a CI4+ or CJ4 rated oil, 5000 mile intervals, with proper filters are a must.
Got Diesel?
Joined: Jan 2004
Posts: 4,345
Likes: 21
You want CJ4 rated oil (latest diesel spec and all good oils are now this rating).
15W-40
5W-40
Are the only year-round diesel rated oils available. There is a Motorcraft 10W-30 (I think) that is diesel rated (old spec I think) but can not be used in the summer and when towing (any time of the year) - per Ford's TSB a few years back.
I personally use Rotella-Syn 5W-40 year round and change it every 5,000 miles with a Motorcraft oil filter bought at Walmart for $17.99/ea!!!
15W-40
5W-40
Are the only year-round diesel rated oils available. There is a Motorcraft 10W-30 (I think) that is diesel rated (old spec I think) but can not be used in the summer and when towing (any time of the year) - per Ford's TSB a few years back.
I personally use Rotella-Syn 5W-40 year round and change it every 5,000 miles with a Motorcraft oil filter bought at Walmart for $17.99/ea!!!
