You must have an older Gen 2 engine. You cannot use Rotella in the Gen 3 engine, nor can you find filters for $20 bucks.I've had an EcoD since spring '14. I don't pay anywhere near that for maintenance stuff. Gallon jugs of Rotella T6 are pretty cheap. Oil filters are available for half of $44. I certainly don't use that much DEF nor does it cost that much. My costs are half what you've described, and I don't use any cold weather additives.