First time diesel owner I ve had a little bit of experience with them. Having said that i also know about the summer/ winter blends for gas it s a bit of a joke when they switch but i didn t realize that it was that much of a change for diesel. For point of reference i use BP diesel it s got a cetane of 47 and they switch over to winter blend 10/1 to 2/29 and then back to summer so the question is what fuel additives or lack there of do ya recommend. I did buy some hot shots daily additive just to see if i can tell the difference with a cetane boost just curious from other more experienced owners