My Ck30hst got a good work out this past week. We have the years average snow fall easily beat by 20 inches already. You wrote stydene. Did you mean Stanadyne? Good stuff but they make different additives and not all of their mixes are for Winter use to drop the gel point. Read the bottle over and see if yours is for gelling too. Power Service in the white container will drop the gel point by 40. Easily found at Tractor Supply and also saw it at Walmart. I've never used D1 and never added any kerosene either. I've just used the Power Service additive for Winter at the rate/gallon as advised on the bottle, to road diesel after the off road diesel problem I had, and have been good down to -4F' which was the coldest for me running the tractor in the last 12 years. Mine sits in an unheated garage. I do use Stanadyne, with the blue and white label, for the warmer months though to help with lubrication of the low sulfer fuel. Once you figure out how you want to stop the fuel gelling, you'll be good to go.