Talking about the new pee, reminded me of a comment I heard about DEF needing heat for cold temperatures.
MSDS sheet I found didn't say anything about Freezing Point, so I found this:
http://www.brenntagdef.com/en/pages/OPISWhitePapers/Successful_Urea_DEF_Handling__Storage_and_Dispensing_2009_Final.pdf
Chapter 5-Storage Challenges
" A key specification in the ISO-22241 standard is the DEF product痴 urea concentration.
To ensure product stability, DEF producers, buyers, retailers and users should store the fluid at temperatures between 12ーF-86ーF (10ーC-30ーC). Doing so ensures a DEF shelf-life of at least one (1) year. Storage temperatures higher than 86ーF will detrimentally affect urea concentration and below 12 ー F, DEF will begin to crystallize. Both of these circumstances could render the product out of specification and unfit for sale.
It is generally accepted that DEF will have a 1-year shelf-life if stored between 86ーF (30ーC) and 12ー F (-11 ー C). If it is stored at temperatures above 86ーF (30ーC), the shelf-life will be reduced. "
So..... Up here in the Great White Nord, if you leave your truck sitting for a month in the cold with a full DEF tank, it may be pooched. Or..... what I was originally wondering about...... how do you keep the DEF heated when the truck is parked - run an Aux Hotbox to keep the DEF warm ? Yeah..... that's going to help the environment !
OK - high temperature - even here we get days that are well over 30C. What about Texas, Arizona, etc ? Let's check with the EPA.... mebbe you guys are supposed to run an Aux reefer so that the DEF stays chilled out ?
Descriptions I've seen indicate that the DEF tank (and perhaps the downstream system sensors) monitor for poor quality DEF. So..... if your DEF is trashed from High or Low Temperature storage, the system will de-power the motor and/or call up the Guys in the Black Helicopters ?
Reading what I just wrote here.... looks like a cheesy script for a late '70's TV Sci Fi movie !
Don't need an equipment trailer to stall a Prius..... a lady I was talking to last summer drove from Calgary to Ottawa (about 3500 km) hauling a small Uhaul trailer. Got 18L/100km, about 13mpg ! I'd need to tow my house with my 7.3 to get that bad a mileage figure !
I read a book on Rudolf Diesel recently. Mercedes had Direct injection on a 5 ton truck, in 1923. Merc also had a good sized car in the 50's that was getting 6.5L/100km (36mpg).
Progress ?
Naahhhh, we don't need no stinking Progress !
:confused3:
Rgds, D.