Posted by jdemaris on December 23, 2010 at 17:22:01 from (67.142.130.39):
In Reply to: Kero and diesel? posted by JayinNY on December 23, 2010 at 16:09:42:
Your father-in-law may be correct. It depends on what diessel fuel he's using and what kerosene he's using.
Low-sulfur diesel and low-sulfur kerosene behave differently when it comes to gelling in cold weather.
As to you not having problems - kind of hard to interpret unless you actually know exacty what your fuel is - what mix of "winter-grade" and what extras your supplier might be putting in before you buy it. Also, what micron-size your filter system is and how well your tractor or truck warms fuel as it runs.
#2 untreated diesel high-sulfur fuel starts to gel at 16 degrees F above zero.
High-sulfur kerosene or #1 diesel is much more cold-tolerant.
For every 10% standard (high suflur) kerosene you add to #2 diesel, you lower the cloud point by 5 degrees F.
For very 10% low- suflur kerosene you add to #2 diesel, you only lower the cloud point by 2 degrees F.
Much of the ultra-low sulfur fuel being used now (winter mix) will start to gel at 0-5 degrees F if it stays that cold steady for three days straight. That doesn't happen often in much of NY. Below zero at nights and above zero during the day is the norm.
20-30 years ago, diesel fuel in central and northern NY was routinely mixed from 30-70 to 50-50 with kerosene/diesel from the suppliers. So, I assume some customers didn't even know they were using it. Now- medium and low sulfur fuel has many additives put into it before it leaves the suppliers truck - so many of us still don't really know what is in our diesel fuel.
And besides the fuel gel point, many newer diesels are using finer filters that also changes things.
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