Oil Additive

[bismic]

Originally Posted by gtstang462002

More bad information... 15W40 is good down to 5 degrees

Backing up your statements w/ Ford literature is always a good thing - for all of us!!!

So - Even Ford says it is only good to 20 degrees.

BTW - here are two Ford references:
https://www.fcsdchemicalsandlubrican...f/oilchart.pdf

On the last page, look at the heading for the table that includes the 6.0L. It states: "Recommend Motorcraft SAE 15W40 CJ4 above 20 *F / -7*C".

http://www.motorcraftservice.com/vdi...are/index.html

In the link above: Click on "6.0L Diesel Care"
Go to the end of the video
Click on "Diesel oil and filter"
The reference chart is about 1/3 of the way through, it looks like this:

http://www.ford-trucks.com/forums/me...oil-chart.html

[bismic]

Originally Posted by dieselmac

While 15W40 may be "good" (whatever "good" means) to 5*, you can not refute the fact that, below 30ish, 15w40 causes or exacerbates problems with the injectors.

BTW, the OWNERS MANUAL will even lead you to that conclusion. But you knew that, I'm sure.

LOL -

I agree Scott - the previous statements were a little on the inflamatory side ........... (and wrong)

BTW (as you stated Scott) - there are a lot of sources that state the HPOP will shear the oil over time. It is the fluid flow through the tight tolerances that are typical on high pressure oil systems (including the pumps), that will result in shearing modern oils. here is one source:

http://www.bobistheoilguy.com/oilshear.htm

[FordCustomerService]

Originally Posted by bismic

...The reference chart is about 1/3 of the way through, it looks like this:

Ford Truck Enthusiasts Forums - bismic's Album: Miscellaneous - Picture

This reference chart is also available in the Maintenance and Specifications section of most Owner's Manuals or Diesel Supplement documents. I found one in the 2006 F-250 6.0L Diesel Supplement's 3rd printing, page 38.

Keep in mind you can download free copies of these kinds of documents here: https://owner.ford.com/servlet/Conte...OwnerGuidePage

Crystal

[ciuf]

Don't forget the low temps the oil sees running through the turbo. Even gassers recommend shorter OCI's when turbo equipped.

[Killdmycobra]

Originally Posted by gtstang462002

I can only assume that you are referring to my comments, though I do not see how they are in any way shape or form negative. There is a lot of good information and personal experiences to be had on this site as well. The biggest problem with web forums is that they typically only attract people that have problems with whatever that forum is focused on. Here is happens to be Ford trucks. Once they get the answer that they are looking for they move on till the next problem arises and they are back b@#$%^&* again. I will say it again, almost all problems with this motor are self inflicted from people not following the proper maintenance schedule for their vehicle.

The bottom line though is the information that can be had here on this forum or any other forum is that the information is worth what you pay for it.

The problem with running Dino in a HEUI injection system is oil shear. HEUI oil pressure will shear plain oil like no other. Ater running T6 full synthetic, it starts easier and the oil viscosity after 5k is almost as good as new compared to UOA with dino

[05_HARLEY_F250]

I can't really tell who's winning the argument, but I have run my truck in many different climates as I travel alot those range from -10 to 110. It's always noisy when it's cold, at least I couldn't tell a difference. I ran motorcraft 15w-40 after purchasing my truck and changed it every 3k, after about a year I switched to T6 @ 5k no additive, I've been running it for two years and have replaced less injectors than I had to with the motorcraft. I personally "believe" the thinner oil is keeping my injectors happy. The best thing to do would be to spend the extra $2.00 per gal. and try it out for yourself then maybe decide if you want to add any kind of additive.