Good grief, if I had to buy HDEO by the quarts for our diesel, I'd for sure go broke!
I can find Rotella in the gallon jug here at Wallyworld for $13.??
FWIW - the Rotella is easily turned over even by a sohc engine on a -5F day as well.
Funny thing though, I use Delo 400 15w-40 in my diesel, and the Rotella 5w-40 in my gas engine Rodeo.