Power service white bottle - been using it in diesels for 30 years after having one gel up in Michigan. Repair shop my NEW (1200 miles) pickup was towed to. Guy put it a heated shop for a few hours, called me and said I was good to go. He’d added Powerservice and told me if I’d run it in extreme cold it would never gel. He was right and I’ve never had another issue with any diesel no matter how cold. We lived in Mi, Ia, and Il, and my diesels sat outside most times. Never an issue at temps down to -20F ..