Ford's answers to the NHTSA 6.7 Investigation
There was a request for a link to Ford's answer's to the NHTSA investigation posted on a previous thread, since closed. Here is the link: Ford's NHTSA Answers to the 6.7 investigation This PDF i...
Forum Discussion
milsuperdoc wrote:
ricatic, could you explain to us, in plain English, the definition of scar, cetane, lubricity? And, what the effects of Motorcraft PM 22A to the scar, cetane, and lubricity? Can you also explain to us how the water in diesel can affect the scar, cetane, or lubricity? Thanks.
Rick's info is good.
Supplemental:
Cetane:
http://en.wikipedia.org/wiki/Cetane_number
Lubricity is done by 2 common tests referenced in Diesel Fuel Standard ASTM D975.
See this for a quick description in plain english.
www.epa.gov/diesel/presentations/lubricityupdate.pdf
The test are criticized as having little relevance to the reality of high pressure fuel injection pumps circa 2010. However, more tested lubricity is still better than less.
Don't let the propaganda put out by biodiesel people that their stuff tests higher in lubricity fool you.
That is under laboratory test conditions.
They don't tell you how the stuff behave in a Bosch CP 4.2 pump at 2,000 times atmospheric pressure and 150 degrees Celsius.
Water in diesel --- all diesel contain a tiny amount. Biodiesel absorbs water and contain more. Bad to have water so it is specified to no more than....
Enough water gets in.. it collects in the Water separator.
In the uncertain climate over the 6.7, do not use any additives except Ford labeled, recommended for the 6.7 sold by Ford.
Do not use biodiesel, and if unavoidable, smallest possible percentage blend.
Buy only name brand fuel from name brand stations that move a lot of diesel.
Save all receipts.
You will be fine.
