Dodge Cummins cold start -29c
05 Cummins very cold start, never been plugged in. Out side temp. -29c which is -20 fahrenheit. Truck has 4" cat back MBRP Exhaust and an AEM cold air intake. Real diesels dont need to be plugged in
Duramax Cold Start (-22F)
Cold started the duramax after sitting outside in 22 below zero ambient temperatures and windchill at 38 below zero. Block heater was plugged in for 4 hours before firing it up. No fuel additives, just what they have in the pump at the local truckstop. Started on first try.