Since I assume your building was probably built before this year that probably was pretty ugly when it fired up. The engines of old and the fuel of old where the problems there. live in Pa and my knew engine doesn't even smoke long in O degrees with proper warm up on the key ingnition alone with out a block heater. Also the epa has not mandated new standards on that equipment or Farming and construction. Too much politics yet that saved those business's period. That will becoming as the companies streamline the engine manafacturing. Make sure you keep that was as the price alone for 2010 will cost between 14 and 17 thousand more on a diesel. New standard engines and Biofuel resemble the smell of french fries is what most say. Nothing like what you smelt on the fire up. I deliver office equipment to new building like the Capital Campus in Richmond Va and have witnessed there generator test fires this last summer and they had no smoking or noise problems on there new equipment like you described. Mostly noise from the generator whir is what I heard. Of course you can also witness standard on JR's original validation video and his Juice as I said at the time sure made that Old diesel(like your Generator) sound Great. Exspecially the old detroit in the Video. Check it out and you will see a difference. Good luck and enjoy the weekend.